Ive gone off pes2010 simply to the fact that in fifa you cant get a superplayer like messi dribble all the way down the flank and shoot and score. World cup game simply was a superb game as it was fast and realistic. It was realistic in terms of animations and tackling(slide tackle) and block tackling is easier. For those who disagree please give the world cup game some time playing and you will eventually be taken in by fifa. If you are still skeptical then remember I was once in your shoes that pes was still king but I realised that I was wrong, even looking at the pes 2011 trailer the animations still look jerky and realistic. messi is still a super player as he scored from the most awkward of positions. hopefully pes could reignite itself once the next gen consoles appear like ps4 etc as they will be multicore not one core split into 8 threads with one disabled like ps3 so the physics should be much better.
I did play Fifa 09, Fifa 10, Fifa WC...and neither is good.
Since you mentioned Fifa WC, I will give my thoughts and that game.
I bought Fifa WC, and initially I was very impressed. After winning my first match 6-0 with Argentina against England on default difficulty I knew I have to turn up the difficulty or I'll become bored after 1 day.
I played the game quite a number of hours...and won the World Cup numerous times...this is on the second highest difficulty, I think it's professional? not sure...but just beloew Legendary though. I won against England in the Semi Final 8-0 with Netherlands (or Holland in Fifa). I won 13-0 against Brazil...i know...
You mention that you can't take a guy like Messi and run through players and score from stupid angles...true, but hey I've seen Messi run through numerous players and scored from tight angles in real life??? So not very realistic in Fifa too hey? You cannot beat any defender with any attacker..which isn't realistic at all seeing that Cristiano Ronaldo and Messi do this every week.
It's initially a good game, but I got bored with it after 3 weeks and sold it. The goals are either one-on-one goals or headers from corners or crosses...that's it. The defensive play is sloppy, and the gameplay is waaay too fast.
I turned too Fifa as my favourite football game with Fifa09 after I quite enjoyed Fifa 08 and the disaster and let down that was PES08. I played Fifa 09 one month, winning everything in my first year in Manager Mode and sold it because I was bored with it. Needless to say I also bought PES09 and played more than 200 hours on it.
I bought Fifa 10, after winning everything in my first year with Lazio in Manager Mode AGAIN (on the second highest difficulty again) I sold it after a month because I got bored as hell...AGAIN
Repeat cycle...
Fifa's games or wow with all the smokescreens of presentation, animations etc. but you get bored very quickly as the gameplay has not depth at all. I've never played a Fifa game nearly as much as any PES game, even the crap ones.
Believe me buddy, you will see in a year or two's time...I was there in your place as well. You will see that PES is the only fun football game around and after you got bored with the Fifa games, and frustrated because you cannot edit ratings or customize the game to your liking etc. you will come running back to PES...as I did this year.