Hello there. PES Fanboy here.

Played the demo for 3h.
Almost everybody is raving about the demo, so I thought I'd point out some negative things about it (some of these might be because i'm not used to the game yet, so Fifa fans might tell me if it's a question of time or not.)
First and foremost, I like the game, and I think that just like PES, It has a few things that prevent it from being Football heaven. Here goes:
1 Heading. On defence at least, I'm Rio and Vidic, yet any foward from Red Bull wins almost every aerial battle against me. Pisses me off. Could it be that I have to work more to anticipate where the ball is going?
2 Goalkeeping. On the first three games I played this happened twice: cross from the wing, my goalkeeper stands still as the ball flies over and near him, striker on the 2nd post heads it home with no opposition. The GK could've just jumped for the ball.
3 Supercancel. Yes, it's there, but it doens't work the same as in PES. It cancels shots, passes and crosses, but you can't use it to "force" your player out of a rail. Many, many times I found myself wanting to meet the ball halfway and couldn't, only to see the defender intercept the ball.
4 Opposition defence. It's been said that in previous games the GKs were superhuman. Think that now defenders are superhuman. I mean, Red Bull defenders taking the ball away from Messi, Ronaldinho and Henry as easy as taking candy from a baby... (Maybe there are ways to counter this and I need to play more...)
5 Nets. The net on the training ground is not the same as in game... Why not EA?
6 Response times are still not as good as PES.
7 Finally, same as everybody else, I'm pissed cause I can't score to save my life.
Now, don't come to me saying I'm a party pooper or anything, I'm really enjoying the game and only wish it was perfect, but it's not. There are a lot of very good thing about the game that have been mentioned before, so I didn't bother to repeat them.
Barring any unforseen financial crisis I'll probably get this and PES.
Peace and enjoy.