I need to dyno this motor. The difference between all the motors is how high and wide the torque and rpm curves are. Peak power is a rule of thumb for electric motors but it really wont tell you the difference between a short 125 watt peak and a long 100watt peak. Allot of the spec motors are very peaky meaning the gearing and rollout are very sensitive. A wide 100 watt is easier to drive and setup and in some case will always beat a peaky 125watt.