Well.... The "Ultimate PS3 Exclusive Holy Crap OMG" graphics are Killzone 3, which I played the demo of.
It wasn't as good as Crysis 2 on 360. It had nowhere near the colour, draw-distance, physics, interactivity, etc.
So.... Crysis 2 beats the OMG-best-graphics-on-PS3 with both the 360 and PS3.
Maybe both consoles really are the same power for a game like Crysis 2.