The contenders
The Ninebot Max G2 is the new range and comfort king. The Xiaomi Pro 2 is the lightweight value champion.
Ride quality
This is the biggest difference. The Max G2 has front suspension and tubeless self-healing tires; the Pro 2 has none. On rough city streets the Max G2 wins hands down.
Portability
The Pro 2 weighs just 32 lb vs 54 lb for the Max G2. If you carry your scooter up stairs or on transit, the Pro 2 is far easier.
Range
The Max G2's 43 real-world miles beat the Pro 2's 28 by a wide margin.
Verdict
Buy the Ninebot Max G2 for comfort, range and reliability. Buy the Xiaomi Pro 2 on a tighter budget or if you need a lighter scooter.