1. MC230 is for brushed motor, cannot run a brushless motor.
2. That means the brushless motor is built-in a senor, there is a senor cord to be connected to the ESC.
有感冇刷 have a sensors to detect the position of the rotor of the brushless motor. The speed controller gets the rotor position signal via the sensor cable and produces appropriate currents to different phases, totally 3 phases, of coil of the brushless motor. As a result, the speed control of a 有感冇刷 is very smooth and linear, like the brush motor.
冇感冇刷 did not have sensors. The speed controller "guesses" the position of the rotor based on the output current of different phase. As it is an estimation only, the rotor will turn very "unsmooth".