Not here to pick sides, but i'm seriously wondering if i've downloaded the same demo as everyone else. I'm on the PS3 played a few games of PES 2010, graphically it's better than Fifa, especially the pitch, but on the other hand even though the players resemble their real life counterparts better than Fifa does, they look really ill, even zombie like, especially Gerrard and Ibra, such pale skin with blackened eyes and really grainy, i play in HD and all other games look fine.
Then the player animation and cut scene celebrations, the players movements are so robotic, the way players fall after a phsical challenge or a slide tackle was not very good, no where near the level of Fifa, i was constantly shaking my head and cringling just playing it, and i've not even got to the player running animations, it's terrible i'd expect better on the PS2, i guess this is where Fifa is really in a league of it's own and having played FIFA 08 and 09, i guess i'm spoiled where as players that have only played PES will not think it's a big deal or may not see anything wrong.
Moving onto the gameplay, the build up was better than Fifa in the fact that you really need to think when building your attacks, and there is more of a midfield battle, although i hear Fifa is addressing this and reports are the Fifa 10 gameplay is slower than what it is in the demo, but we'll have to wait and see, but there is a serious problem with player reactions there seems to be a second delay after every button press, i can only compare it to playing online in Fifa against a player from Australia and the game is lagging badly, but this shouldn't happen offline.
I also found crossing to easy and all my goals came from pin point crosses even after bumping up the difficulty level, even players that were running full speed and slightly off balance could ping in a goood cross.
I found trying to send the player on a run frustrating as they was no movement which is the main reason there was more of a midfield battle compare to Fifa as you had little option but to pass back.
I'd give the demo 6.5/10, for me i hope some serious work has been done since the release of the demo, otherwise imo they will me miles behind Fifa, which can only be bad for football gaming fans regardless of which game you prefer.