I wouldn't use either of those motors. I tried them both and the motor/ESC gets a little too warm for my taste. An 8L 0r 9L motor on 3s would be better IMO. Or even an S motor. The outside dimensions of the MM motors are very close to an S motor, but the S motors have more of the can filled with coil wire so they are stronger. So really, the MM motors are kinda like a sub-S size IMO.