My honest opinion here, nothing else.
Pes 2012 deserves a 7.5-8 mostly. Not more, not less.
Why?
It has some really, really solid points but a few weak points that are weak in a way that they make it look inferior. However after playing both fifa 12 and pes 12 I can honestly say that pes deserves a higher score.
Fifa 12 for me scores between a 7-7.5.
Why these scores?
Positives about Pes
AI is tons better than Fifa's dump AI.
Fifa's AI aren't good and do not play well, they leaves spaces and sometimes will never attack you if you are near a DEFENDER (note that if you are near fifa's midfileders then, the game becomes pressure trash again). The only way for Fifa's CPU to win is to surround his players with invisible barriers where you can never attack them nor steal the ball from them.
ALTHOUGH PES 12 CHEATS ALOT, the goals that the CPU scores are believable because you can do similar goals. The way the CPU scores on Fifa is unbelievable and you can never replicate it. THAT SHOWS CHEAP PROGRAMMING and people fall for it by saying that it is hard. No it is not hard.
Ofcourse, depth is the key here so Pes takes it easy.
Although I slated fifa 12 so far, the game is not bad at all. It is quite enjoyable as it has 1 MAJOR THING OVER PES. That is CONTROL. You have the ability to shoot wherever you want as the powerbar rises slower and gives you much more time to think about where to place the shots, even if the overall shooting is well behind pes in terms of individuality.
Fifa 12 is much better than Fifa 11, but Pes 12 overall is just better and the deciding factor between the 2 was enjoyment. And I enjoyed Pes more. Actually much more. Fifa's extremely low point was the dump stupid AI that makes unbelievable goals.