My pros and cons for PES 2015.
PROS:
Faces are amazing up-close. Player models are quite good too.
Facial expressions are amazing, you can distinguish between happy, sad and angry. (Boateng, Lichtsteiner and Bonucci are incredible)
Player ID (CR7, Messi, Robben, Asamoah, Llorente e Pirlo are my favourites)
The way fans react to tackles etc.
Cristiano Ronaldo. (Face, movement and celebration)
Goalkeepers, although I have a hilarious mistake from Neuer to show you.

The dynamic weather. I'm pretty sure the intensity of the sun changes in the demo. Plus the rain looks great, from the trailer.
It's fun at times.
CONS:
Gameplay is good but nothing special. I find it really sloppy at times, between long touches and collisions. I feel as if I don't fully control my players. When compared to FIFA, you can do so little with each player.
Player reaction to passes is quite bad, I play manual so sometimes if the pass doesn't go right to them they just leave it and eventually go for it when it's too late.
Collision system isn't great.
Shots are overpowered.
Shooting in general is bad, a lot of the goals I've conceded in my box are horrible, from the animation to the lack of power. They're all the same and it looks like the scorer shifts towards the ball with his foot rather than striking it with force. This happens with passing too.
Goalkeepers can throw the ball way too far.
Penalties. They should copy Fifa's.
The AI doesn't foul. I got my first freekick today, in my own half though.
Graphics from far aren't the best (i.e. far from NG graphics), Fifa looks way better. The whole thing looks a bit washed out to me.
I really dislike PES' kits, they often look plastic. When will they introduce dynamic kits? It's ridiculous how the kit goes from one crease texture to another. Fifa is the same but the texture of the kits in it are more cloth-like.
GUI is terrible, whether it's the pause menu (looks like PES6), the tips, the pre-match menu or the presentation before the match. Konami has so much to learn from FIFA under that aspect.
As you can see, I'm very critical of and disappointed with PES, especially with all this hype.
I'll probably get both but I enjoy FIFA's gameplay more. At this stage, I think it's a fact that it's the better 'product'.
I have every single PES since ISS (I'm pretty sure I do, might have skipped 2009) so I'll end up getting this one too, with the difference that it won't be my 'main' football game.