I can't really play IV to be honest. Maybe its just me but it doesn't seem like there's any competition involved. Like its more of a simulation rather than a game. In III I feel like I'm competing with the AI to win, and I always have to look over my shoulder to make sure no one's stabbing me in the back. I like that, its more competitive. I also like the look and feel of III a lot better. Its kind of historical painting-like, whereas in IV its like a cartoony representation of some stuff we heard about in history class.