No comparison whatsoever.
Uncharted 2 pushed better textures, better animations, better facial animations, better lighting, better shadows. The only technical advantage God of war 3 has is skin texture. The art behind the textures is simply better.
Its like comparing mass effect 2 and mgs4. mass effect has much better skin textures, but mgs4 is so unbelievably better in every other visual way.
I've been wowed 3 times this gen. MGS4(everything, every level looks better), Killzone 2(first time you get control with a gun)and mass effect (solarians specifically, for facial texture detail.)
God of war was by far the coolest looking, but not technically the most impressive







