Its always better if you attack a cutting cycle if you have established a maintenance diet, no matter what diet you are running it will take around 6-8 weeks to imprint a maintenance diet onto the body, once you have done this you can start attacking that diet slowly to which the body will respond well to, everytime you hit a sticking point just readjust the diet either by calories or switching carbs and protein.
Once you have finished PCT and you have fully recovered you can start any kind of diet you like but anything to harsh or fast will attack the muscle you have gained, slowly is the key to cutting fat away from the muscle.