any thing that is sensored usually has a reverse direction function in the esc.(i know my novaks do) But non sensored motors without adjustable endbell timing are set at 0 deg. so they are neutral and will run and perform just as well in either direction. Especially mini motors such as mamba, tekin,and the ammo motors. In these systems timing is all taken care of via the software within the controller.
But if you try and swap the A and C wires on a sensored system you will get an error message from the esc (light blinks) indicating that it is wired wrong.

Also keep in mind that with sensored systems, even if you use the reverse rotation feature , if you have moved the mechanical timing on the end bell it WILL runn better in one direction than the other.I found this out because i usually run my 17.5's with the timing retarded to produce more torque and cooler temps for running dirt. Well I set up a new XBR speedo for a car and you could hear it was running faster in reverse than it would in forward.
so If you reverse direction on the motor remember that if you want to play with the mechanical timing for tuning that it is backwards
IE clockwise to retard, counterclockwise to advance when it is normally counter clockwise to retard and clockwise to advance.