I have both systems and i have played it on both systems.
SKATE 2 is an amazing game for the guy who said it wasn't good.
the 360 version is way way way way way better.
since the game replies on the joysticks so much, the stiff and grip-ness of the 360 analog sticks are way better. the ps3 analog sticks move to fast to be able to pull the tricks that you want off. the 360 allows you to rest your finger in the joystick which gives you way more control
Skate 2 for 360>>>>>>>>>>>>>>>>>>PS3 version