Quote Originally Posted by Ludens
I thougth the S:TW difficulty bonuses were identical to M:TW: at easy you get a morale bonus; at expert the A.I. gets one. Also the A.I. gets more clever at higher difficulty (and receives a slight stat bonus as well).

This is my understanding as well. On Normal and Hard, neither the player nor the AI gets any sort of bonus/cheat; everyone's on a level playing field.