Fast Answer for Busy Riders ⚡ (TL;DR)
The Xiaomi 4 Pro is the overall better scooter for most riders: it feels more solid, brakes harder, climbs better, and offers a more polished, low-drama ownership experience, even if it costs noticeably more. The SoFlow SO2 Air Max fights back with one thing: huge real-world range in a package that is still reasonably portable and surprisingly light for the battery it carries. If you are a long-distance commuter obsessed with not charging every day and mostly ride in countries limited to lower speeds anyway, the SoFlow makes sense.
Everyone else - daily city commuters, riders who value braking, build quality, parts availability and a "just works" feel - will be happier on the Xiaomi 4 Pro. Think of the Xiaomi as the sensible, well-sorted hatchback, and the SoFlow as the slightly quirky long-range special.
If you want the full story - how they actually feel on battered bike lanes, who suffers most on hills, and which one will annoy you less after a year - read on.
Electric scooters have grown up. We're no longer choosing between wobbly toys; we're choosing between credible vehicles that can replace a car for a lot of city trips. The SoFlow SO2 Air Max and Xiaomi 4 Pro sit right in that sweet spot: serious commuter machines that still fold, still fit in lifts, and don't weigh as much as a small moon.
I've spent time on both: long, boring commuter drags, late-evening rides home in the rain, and the usual "let's just see if it can handle that hill" detours. On paper, one promises almost absurd range at a bargain price; the other leans on refinement, brand ecosystem and a very well-sorted chassis. In reality, both are better than the cheap stuff - and both have enough weaknesses that you really want to pick the one that matches your life, not the spec sheet.
Let's dig into where each shines, where they annoy, and which one will actually make your daily ride less of a chore.
Who Are These For, and Why Compare Them?
These two live in the same broad "serious commuter, not a toy" category, but come at it from different angles. Both are built for riders who want a scooter they can ride every day, in real traffic, without feeling like they're standing on a folding deck chair.
The SoFlow SO2 Air Max is aimed at riders who value distance above all else. It's the choice for people doing longer suburban-to-city commutes, or students criss-crossing a big campus all day, who hate the idea of nightly charging. It focuses on a big battery in a fairly lean chassis, with legal-limit speed and pragmatic safety kit.
The Xiaomi 4 Pro is more of an "urban default". It's for people who want something that just feels finished: solid frame, good brakes, big-brand support, enough power to handle steep city ramps and a ride quality that won't shake your breakfast out on rougher bike paths.
They overlap in use case, price band and performance class enough that many buyers will consider both - especially if you're torn between maximum range and maximum polish.
Design & Build Quality
Park them side by side and the design philosophies are obvious. The SoFlow looks like a competent, modern commuter - fairly clean lines, a bit of colour, functional. The Xiaomi looks like the product of a consumer-electronics giant: tighter tolerances, more elegant stem, and that familiar understated matte finish that could pass in a tech showroom.
Picking up the bars and rocking them side to side, the Xiaomi's stem feels a notch stiffer. There's less of that faint, hollow flex you often get in mid-priced scooters. Welds and joints look more uniform; cable routing is tidier and better protected. The SoFlow is far from flimsy, but it feels more like a decent OEM chassis that's been spec'd smartly, rather than something obsessively refined over several generations.
The SoFlow's integrated colour display plus NFC lock is a nice touch - tapping a tag to wake your scooter does feel pleasantly sci-fi - but the plastics and buttons don't quite have the same "this will still look fine in three winters" vibe as Xiaomi's cockpit. Xiaomi's simpler LED display and magnetic charging port feel almost boringly well executed; in daily life, boring is often what you want.
In short: the SoFlow is solid enough, but the Xiaomi feels more premium and more durable in the hand, like it will age more gracefully with daily abuse.
Ride Comfort & Handling
Neither of these has "real" suspension. Your knees and the tyres are the suspension - and how each scooter manages that makes a big difference after a few kilometres of broken pavement.
On the SoFlow, the first impression is actually quite pleasant: those large pneumatic tyres take the sting out of standard city imperfections. Fresh asphalt and regular bike lanes feel smooth, and the relatively light chassis responds easily to body input. After a while, though, on rougher surfaces the frame starts to feel a bit more nervous. Small rattles develop quicker, and on long cobbled stretches your hands get more buzz than you'd like. It's acceptable for what it is, but not something you look forward to if your city specialises in medieval paving.
The Xiaomi 4 Pro, despite also lacking suspension, feels more "planted". The wider bars calm the steering down nicely, and the big tubeless tyres, when run at sensible pressures, round off most of the harshness. On cobbles and patchwork tarmac it's still firm - let's not pretend otherwise - but the hits are more controlled. The chassis doesn't shudder; it just takes the abuse and carries on. You end a 10 km city run more relaxed on the Xiaomi than on the SoFlow.
In tight manoeuvres - weaving around pedestrians, threading through bollards - both are predictable, but the Xiaomi's slightly more mature geometry and bar width give it a more confident, "grown-up scooter" feel, especially at the top of its speed range.
Performance
In the city, outright top speed is capped by law for both, so the real story is torque, consistency and braking.
The SoFlow's rear motor has decent punch off the line. Up to its legal limit it feels eager enough; in flat cities it never feels painfully slow. At higher battery levels the pull is pleasantly brisk, and for lighter and average-weight riders it will handle moderate inclines without much drama. Once the battery dips, though, you do start to feel the edge softening sooner than you'd like - the scooter still moves, but that zippy feeling fades and hills become more of a negotiation.
The Xiaomi 4 Pro, in contrast, feels like it has a bit more in reserve. In Sport mode, it surges forward with a smooth, confident shove rather than a kick. You don't get the impression it's straining at its limit every time you ask for full power. On steeper ramps, especially with heavier riders, the Xiaomi keeps more of its pace where the SoFlow starts to cough and clear its throat. It's not a rocket, but around town it simply feels more capable and less easily flustered by gradients.
Braking is where the gap really opens. The SoFlow's front drum plus rear electronic brake is fine for average city use - progressive, low-maintenance, no drama in the wet. But when you push it harder, or emergency-brake from top speed, it lacks that last bit of bite. You feel the scooter lengthen the stopping distance slightly, and you learn not to tailgate cyclists.
The Xiaomi's rear disc plus front electronic braking gives you noticeably more confidence. The rear disc digs in properly; you can haul the scooter down hard without things getting sketchy. The lever feel is better, and the balance between mechanical and electronic braking is nicely judged. In wet conditions or downhill stop-and-go traffic, it simply gives you more margin for error - something you're grateful for when a car door flies open in front of you.
Battery & Range
This is the SoFlow's party piece. That big battery means that, in real life, you genuinely can go much further than most commuters will ever need in a single day. In mixed riding at full speed, you're realistically looking at several tens of kilometres that still leave a comfortable buffer. If your commute is long enough that you're currently eyeing the battery bar halfway home, the SoFlow changes the game: you plug it in once or twice a week and stop thinking about it.
The trade-off is charging. From nearly empty to full is very much an overnight affair. Quick top-ups over lunch barely move the needle, so you have to be a bit more deliberate about when you plug in.
The Xiaomi 4 Pro plays in a more conservative but still practical range bracket. For typical city commutes - say, into town and back with a bit of detouring - it's absolutely fine, especially if you're not red-lining Sport mode the whole way. It won't match the SoFlow's long-distance stamina, but for most riders it delivers "commute plus errands" without anxiety. And because the battery is smaller, that same overnight charge fills the tank more than enough for another full day.
Efficiency wise, the Xiaomi does a decent job of turning watt-hours into useful kilometres thanks to a well-tuned controller and regeneration. The SoFlow's bigger pack gives it more brute-force range, but gram-for-gram and euro-for-euro it's not as obviously efficient once you factor in its lower real-world speed cap and usage patterns.
Portability & Practicality
On the scales they're in the same ballpark, but the SoFlow squeezes a noticeably larger battery into a similar weight, which is objectively impressive. When you actually have to carry them, though, the story is more nuanced.
The SoFlow folds in a familiar way at the base of the stem. The latch is robust enough, and once you've done it a few times it's quick. Carrying it up a flight of stairs is doable, but you're at the upper end of what most people enjoy lifting one-handed. The non-folding bars make it a bit more awkward in tight hallways or busy trains - you're constantly aware of that handlebar span poking into other people's personal space.
The Xiaomi 4 Pro is no featherweight either, but the folding mechanism feels more refined and reassuring. The higher-mounted latch is easier to reach, the stem locks down cleanly, and the package feels slightly better balanced in the hand. It's still not something you want to carry four floors every day, but for "two steps into the train, into the boot, up one flight" duty, it's workable. It is bulkier than the old small Xioamis, though - if you're coming from an M365, be prepared for a chunkier folded presence.
For pure "range per kilogram carried", the SoFlow wins. For everyday liveability - folding, unfolding, stowing, wheeling around in tight indoor spaces - the Xiaomi's polish makes it easier to live with, even if the raw numbers look similar.
Safety
Both brands clearly know you're going to be mixing with traffic, and they've equipped these scooters accordingly - but the emphasis is slightly different.
The SoFlow gives you a very bright headlight and decent road presence. That high-output front beam is genuinely useful on unlit paths; you can actually see surface texture, not just announce your existence. Handlebar indicators are a nice step up from waving an arm while wobbling, though rear visibility of those signals isn't ideal on all versions. Tyres are proper air-filled units with good grip in the wet, and the IP rating is pretty generous, so sudden showers are more of a nuisance than a threat.
The Xiaomi counters with an integrated lighting package that feels more thought-through as a system. The front light throws a clean, controlled beam; the rear light is bright and responds clearly to braking. Where available, the built-in indicators are well integrated into the handlebar ends, and drivers tend to notice them more than you'd expect from tiny LEDs. The self-sealing tubeless tyres are quietly brilliant for safety - not because they grip better (though they do a fine job), but because they massively reduce your chances of a sudden flat at the worst possible moment.
Braking, again, tilts in Xiaomi's favour. That rear disc plus electronic front braking setup allows harder, more controllable stops than the SoFlow's drum-and-regen combo, especially on steeper descents or wet zebra crossings. Add in the more stable chassis at speed and the 4 Pro feels like the safer, more confidence-inspiring machine when everything goes wrong at once.
Community Feedback
| SOFLOW SO2 AIR MAX | XIAOMI 4 Pro |
|---|---|
What riders love
|
What riders love
|
What riders complain about
|
What riders complain about
|
Price & Value
On headline price, the SoFlow plays the value card very hard. For what you pay, that battery size and legal-ready equipment look generous. If you judge value primarily as "how far can I go per euro spent", it does extremely well. The flip side is that some of the savings show up later: less refined build, patchier customer support, and a brand that doesn't have Xiaomi's global parts ecosystem.
The Xiaomi 4 Pro asks for a clear premium. On paper you might think, "I could get a faster scooter with suspension for that." And you'd be right - but many of those rivals won't give you the same reliability, quality control, software support or resale value. Day to day, you're paying for less faff: fewer surprises, easier repairs, better documentation, and a chassis that still feels tight after thousands of kilometres.
If your budget ceiling is firm and you truly need long range, the SoFlow is a rational pick. If you can stretch, the Xiaomi makes more sense as an overall package for most riders, especially factoring in what it's like to live with a scooter for years, not months.
Service & Parts Availability
This is one of those boring-but-critical topics no one wants to think about until something breaks.
With SoFlow, you're dealing with a smaller brand focused on a few European markets. The hardware is fine, but community reports of slow or unhelpful support crop up often enough to take seriously. Official parts can be more of a treasure hunt, and you're often relying on your retailer or your own wrenching skills to keep the scooter happy in the long term.
With Xiaomi, the story is completely different. These scooters are everywhere, and so are their parts. Need a new brake lever, tyre, mudguard, or even a controller? There's a cottage industry of spares and upgrades, countless tutorials, and repair shops who already know the platform inside out. Warranty is usually handled through big, established retailers. It's not romantic, but it is convenient.
If you're mechanically confident and like a bargain, SoFlow is workable. If you want the "it breaks, someone else fixes it quickly" experience, Xiaomi wins comfortably.
Pros & Cons Summary
| SOFLOW SO2 AIR MAX | XIAOMI 4 Pro |
|---|---|
Pros
|
Pros
|
Cons
|
Cons
|
Parameters Comparison
| Parameter | SOFLOW SO2 AIR MAX | XIAOMI 4 Pro |
|---|---|---|
| Motor power (rated) | 500 W rear hub | 350-400 W front hub |
| Top speed | 20 km/h (region-limited) | 25 km/h (region-limited) |
| Claimed range | 80 km | 45-55 km |
| Real-world range (typical) | 45-60 km | 30-40 km |
| Battery energy | 626,4 Wh (36 V, 17,4 Ah) | ≈468 Wh (36-48 V, 12,4 Ah) |
| Weight | 17,8 kg | ≈17,0 kg |
| Brakes | Front drum + rear electronic (regen) | Front E-ABS + rear disc brake |
| Suspension | None (reliant on tyres) | None (reliant on tyres) |
| Tires | 10" pneumatic | 10" tubeless self-sealing (DuraGel) |
| Max load | 120 kg | 120 kg |
| Water resistance | IP65 | IPX4 |
| Approx. price | 477 € | 799 € |
Final Verdict - Which Should You Choose?
If I had to describe them in a sentence each: the SoFlow SO2 Air Max is the affordable distance-lover that does its job without much glamour, and the Xiaomi 4 Pro is the more rounded commuter that feels like it's been through several generations of refinement.
Choose the SoFlow if your absolute priority is range and you're operating on a tighter budget. Long, flat suburban runs, legal-limited markets, and riders who value "charge once, forget for days" will be well served. You'll accept slightly rougher edges in build and support in exchange for that freedom from the socket.
Choose the Xiaomi 4 Pro if you want a scooter that simply feels more sorted in daily use. The handling is calmer, the braking clearly better, the tyre and parts ecosystem far more reassuring, and the overall ownership experience more polished. For most urban riders, that matters more than having an extra handful of kilometres in the battery that you'll rarely actually use.
If I were spending my own money for a daily city commute with mixed traffic and the usual urban chaos, I'd live with the Xiaomi's price and lack of suspension - because when everything goes sideways at an intersection, I want that frame, those brakes and those tyres under me.
Numbers Freaks Corner
| Metric | SOFLOW SO2 AIR MAX | XIAOMI 4 Pro |
|---|---|---|
| Price per Wh (€/Wh) | ✅ 0,76 €/Wh | ❌ 1,71 €/Wh |
| Price per km/h of top speed (€/km/h) | ✅ 23,85 €/km/h | ❌ 31,96 €/km/h |
| Weight per Wh (g/Wh) | ✅ 28,4 g/Wh | ❌ 36,3 g/Wh |
| Weight per km/h (kg/km/h) | ❌ 0,89 kg/km/h | ✅ 0,68 kg/km/h |
| Price per km of real-world range (€/km) | ✅ 9,09 €/km | ❌ 22,83 €/km |
| Weight per km of real-world range (kg/km) | ✅ 0,34 kg/km | ❌ 0,49 kg/km |
| Wh per km efficiency (Wh/km) | ✅ 11,93 Wh/km | ❌ 13,37 Wh/km |
| Power to max speed ratio (W/km/h) | ✅ 25,0 W/km/h | ❌ 16,0 W/km/h |
| Weight to power ratio (kg/W) | ✅ 0,0356 kg/W | ❌ 0,0425 kg/W |
| Average charging speed (W) | ✅ 69,6 W | ❌ 52,0 W |
These metrics strip away emotion and look purely at how efficiently each scooter turns money, weight and time into speed, range and power. The SoFlow dominates on pure value and energy metrics: you get more watt-hours, more range and more power per euro and per kilogram. The Xiaomi only wins where its higher top speed helps the weight-per-speed figure - everything else here reflects the SoFlow's "big battery for not much money" formula. That doesn't mean it rides better; it just means the maths likes its battery-per-euro story.
Author's Category Battle
| Category | SOFLOW SO2 AIR MAX | XIAOMI 4 Pro |
|---|---|---|
| Weight | ❌ Slightly heavier overall feel | ✅ Marginally lighter, better balance |
| Range | ✅ Goes noticeably further | ❌ Adequate, but shorter |
| Max Speed | ❌ Lower legal cap | ✅ Higher legal cap |
| Power | ✅ Stronger shove off line | ❌ Less rated grunt |
| Battery Size | ✅ Much larger capacity | ❌ Smaller battery pack |
| Suspension | ❌ Tyres only, more nervous | ✅ Tyres plus calmer chassis |
| Design | ❌ Functional, a bit generic | ✅ Sleek, more premium presence |
| Safety | ❌ Weaker brakes, mixed signals | ✅ Strong brakes, safer package |
| Practicality | ❌ Folded bulk, weak ecosystem | ✅ Easier life, better support |
| Comfort | ❌ More rattly, less composed | ✅ Smoother, more relaxed ride |
| Features | ✅ NFC, bright headlight | ❌ Fewer "wow" extras |
| Serviceability | ❌ Parts harder to source | ✅ Very easy to service |
| Customer Support | ❌ Patchy brand responses | ✅ Stronger retail backing |
| Fun Factor | ❌ Competent, slightly dull | ✅ Feels more eager, playful |
| Build Quality | ❌ More flex and rattles | ✅ Tighter, more solid frame |
| Component Quality | ❌ Serviceable, nothing special | ✅ Better brakes and details |
| Brand Name | ❌ Smaller, mixed reputation | ✅ Global, well-known brand |
| Community | ❌ Smaller, fewer resources | ✅ Huge user base, guides |
| Lights (visibility) | ✅ Very bright front light | ❌ Good, but less standout |
| Lights (illumination) | ✅ Strong road illumination | ❌ Adequate, less impressive |
| Acceleration | ✅ Punchier off the line | ❌ Smoother, but milder |
| Arrive with smile factor | ❌ Feels more utilitarian | ✅ Feels sorted and confident |
| Arrive relaxed factor | ❌ More fatigue on bad roads | ✅ Calmer, less tiring |
| Charging speed | ✅ More Wh per charge hour | ❌ Slower fill per Wh |
| Reliability | ❌ More reports of niggles | ✅ Track record, fewer issues |
| Folded practicality | ❌ Awkward bars, less compact | ✅ Better latch, easier carry |
| Ease of transport | ❌ Awkward in tight spaces | ✅ Easier on trains, in cars |
| Handling | ❌ Less composed at speed | ✅ Stable, confidence-inspiring |
| Braking performance | ❌ Softer, longer stops | ✅ Stronger, more controllable |
| Riding position | ❌ Fine, but unremarkable | ✅ Better for taller riders |
| Handlebar quality | ❌ More basic feel | ✅ Wider, nicer ergonomics |
| Throttle response | ✅ Snappy, responsive | ❌ Smoother, less sharp |
| Dashboard / Display | ✅ Colour, NFC integration | ❌ Simple but effective |
| Security (locking) | ✅ NFC plus app lock | ❌ App lock only |
| Weather protection | ✅ Higher IP rating | ❌ Lower splash rating |
| Resale value | ❌ Harder to sell on | ✅ Strong used-market demand |
| Tuning potential | ❌ Less community modding | ✅ Huge mod scene |
| Ease of maintenance | ❌ Tr trickier parts sourcing | ✅ Straightforward, many guides |
| Value for Money | ✅ Massive Wh for the price | ❌ Pricier for raw specs |
Overall Winner Declaration
In the Numbers Freaks Corner, the SOFLOW SO2 AIR MAX scores 9 points against the XIAOMI 4 Pro's 1. In the Author's Category Battle, the SOFLOW SO2 AIR MAX gets 13 ✅ versus 26 ✅ for XIAOMI 4 Pro.
Totals: SOFLOW SO2 AIR MAX scores 22, XIAOMI 4 Pro scores 27.
Based on the scoring, the XIAOMI 4 Pro is our overall winner. For me, the Xiaomi 4 Pro edges this duel not because it wins the spreadsheet, but because it feels like a scooter I can trust day in, day out, on real city streets with real traffic and real surprises. It rides more calmly, stops more decisively, and carries that reassuring sense that a lot of small details have been sweated over. The SoFlow SO2 Air Max has its charms - especially if you live in the land of long commutes and strict speed limits - but it never quite shakes the sense of being a clever value play rather than a fully polished product. If you want a scooter that quietly gets on with the job and keeps you relaxed while it does it, the Xiaomi is the one you'll still be happy with a year from now.
That's our verdict when we try to stay objective – but hey, riding is mostly about emotions anyway, so pick the one that will make you look forward to your commute every single day.

