A massive step up from Fifa 09.
-The graphics, brilliant.
-Gameplay, fantastic, more realistic now.
-Online play, great.
Though, there a few flaws. What I find annoying is the goalkeepers. They are more prone to 'blunders' and are easy to chip. Once your opponent is one on one with the goalkeeper, he automatically comes out, which results in an easy goal, as you just need to chip him. Also, players can bounce off other players? It looks strange to me, but maybe they think it makes the game more realistic.
What I find great about Fifa 10 is your Virtual Pro. You have to work with it for it to become one of the best, and you can use it in online games as well.
The game is more realistic. The goalkeepers cannot do wonder saves all the time, and players can run in 360 degree angle, meaning that they can't run in only straight lines. They have also added long throws, which is nothing special, unless you have somebody with a good long throw who can throw it into the box (Roy Delap).
Still playing Fifa 10, as I haven't tried all aspects of the game. Currently playing manager mode. However, it has lived up to it's expectation.