It depends, they are two different things.

MOST Futaba radios require you to reverse the throttle in order to work in the "normal" direction (this goes for their air radios as well).

Most car ESCs can go either way, meaning you can calibrate your endpoints at either -100 to +100 or +100 to -100. But in your application, it doesn't really matter.

Additionally if it is a typical sensorless brushless motor you can swap any two wires to reverse motor direction.