I'm going to say Uncharted 2 taking everything into consideration. GoW3 probably has the edge in terms of the perceived image with great assets and lighting, but when you really considering everything the engine in Uncharted 2 handles, particularly around some of the bigger levels and the train, I think overall Uncharted 2 is still the better engine overall.
But it's damn close. The next game using the next iteration of each engine is sure to look even more amazing, too I think.
Try to be reasonable... its easier than you think...







