difficulty levels and force powers

[antaren]

i think i'm on the last level, my mission objective is to kill that dark jedi lizard (sorry that i cant remember the name).

 

i would like to play the way through again, since i'm on normal difficulty. what exactly are the differances between the difficulty levels? other then the enemies having more hit points and less health/shield/ammo, does the ai get harder or more enemies added?

 

also, does kyle ever get all of the force powers? do the differant difficulty levels give you more abilities?