Originally Posted by
howardcano
This is only true for the ESC, due to the I2R losses. The motors will have similar efficiencies and temperatures if they are of similar construction and power output.
Very true, my point also runs with the assumption that a 3000KV motor that is designed to handle 4S USUALLY (not always) be of a different build than a 6000KV motor, which will (to most that I can think of) be a 540 can 2 pole motor.