Summary: Simply put buy pro evo 4. Why? Because EA only want money, they don't care about making a good football game. they farm out a new version of the game with a new gimick each year, and all they do is mess around with the game settings to make it seem different. Ie: better AI defending = worse AI for team mates. If they spent half as long on the actual gameplay than they did on the player likeness' the game might amount to something.
Summary: Talking about online play here - for the first week or so it was fun - now however the old fifa problems are rearing up again. People have discovered that play in a certain way and you are guaranteed to score, so now everyone does this. Trying to play football has gone out of the window. Long ball straight from defence to the forwards and goal, everytime. If you want a game where good football is rewarded, wait for Pro Evo 4.