[Serum]

You can't use the mamba as comparison.

Depening on the software that is on the controller, and the timing, and the startpower and the batteries, it varies a lot.

And besides that, the mamba 8k is used in small, light and nervous cars..

The biggest difference between the high end leher motors and the feigao's are efficiency. (smallest difference though, i personally doubt if you notice it in runtime and topspeed, besides a some hotter engine.)

There will be no difference in cogging with these motors, they are based on the same principle. (2pole, with no magnetic preload) (unlike a 4pole plettenberg)

The 7XL has got a 50% larger rotor than the 10L, (45 vs 30mm)among with that comes a huge amount of torque. Be sure your drivetrain can stand this.

I don't know how fast your want to go, a friend of mine uses a 10L on his 14.3lbs heavy savage and on 15 cells he got a 70.4 km/h topspeed.. (44 mph) and 16 cells is about 100 watts of more power for your motor.. (and the maxx is much lighter as well)

Hope this information is of any good.