Wow I actually enjoyed reading this thread. 99% of the comments were reasonably grounded whilst being in disagreement.
OT
I think uncharted looks better but that could be down to it having more colors, which I prefer.
Also I think some of the people here are right. While it's not exactly a yard stick, most games that have extreme attention to detail in the graphics department tend to have it's other areas well looked after (I guess it benefits from a bigger budget).
And someone already said it but the sound in KZ2 is greatly overlooked. On a good onkyo 7.1, it is rivaled only by MGS4 IMO. The games sound actually impressed me more than it's graphics