ItsAqua Well that is one name it goes by. Much like all scooters there are different models and variations based on the country they are marketing it to. Generally that means how fast it goes and nothing more.
WIIZZEE WS11 MAX
All use the same frame. some will have the grip tape in different places. Others will have a upgraded screen and other will use the QS-S4 with a finger or thumb throttle. Most will have speed dampeners on them to limit your max speed. Some have different steering column (round or square) and other have a different locking mechanism for the handle bars. I have even seen some remakes with folding handle bars.
Get a fame you like and you can alter the scooter in tons of ways.
Speed = Volts + Motor wattage
and those can both be upgraded.
1: Frame you like that is easy to work on
2: Battery distance (they advertise how far it goes if you use the scooter in the lowest setting and single motor so it is much much less when you use the high settings and dual motor)
3: Available upgrades through the company you plan to buy from
4: the company reviews… some of them you get your purchases 1-3 months later and their customer service is bad bad bad