Uncharted.
Gears looks amazing, but in the end, despite how far Epic pushed it (which was pretty far) Uncharted's engine, tuned and designed for a single platform vs multi-platform, just delivers a little more in every area graphically IMHO - better character models, better animations, environments, etc.
But it's close, which is a testament to Epic with an open, multi-platform engine (albeit one they know inside out as its developers) vs a totally console specific engine that is known inside out by its developers.
Try to be reasonable... its easier than you think...