I havent played PES5 at all. SO this is only comparin the original WE9 to WE9I. First off their is less calls from the ref. A LOT less!!!!! Free kicks feel harder- I find myself having to hold Down on the directional for about a second to get it over the wall There appears to be better animations of player runs and trapping the ball The speed of the BALL feels sligltly slower especially on shots. Ok so it might be another PES5 but compared to WE9 original it feels a lot better.