PC version is definatly alot easier to control, I played the original overlord on PC first then on the 360 and just couldn't play it. The Sequel plays ALOT better with the 360 controller, the way they hotkeyed the magic is alot better.
Overlord 2 is basically like Overlord 1, but with more cruelty and boobies, and a more refined experiance. The quests in Overlord 2 are alot more varied as well, involving more then fetch lever and turn wheel, and the minion dungeons to get the hives are alot shorter and to the point now.
Great game, better then the first in every reguard.