Originally Posted by
Krio
If the motors were out of the car and spinning at the same RPM, the 25.5 turn would provide more braking force.
That would only be true if the ESC and wiring resistance were a significant fraction of the motor's resistance. Otherwise, if the motors have the same stator and rotor design, the rotors have the same strength, and the stators are both at 100% fill, the braking torque would be the same.
Originally Posted by
Krio
If both motors are in a car and geared for the same top speed, the 3.5 would have a much larger mechanical advantage due to the gear reduction would provide more braking force at the same speed.
Correct. I have edited my previous post to match your observation.