IMO forest, mountain and water sections looked great on both systems, PS3 version looked better to me though.
But especially the urban areas on the 360 looked far too cartoony and the section with soldiers looked remarkably unimpressive to me (I assume they are similar on the PS3 as well..... hope not..., it lacked polish and wow factor), especially when compared to Killzone 2 in terms of animations, light sources, atmosphere, special effects and such.







