I think that picture that SHMUPGurus posted of Gears of War 2 is a bullshot. Way too much anti-aliasing going on in that picture.
Take for example, these 2 shots, one of which is clearly a bullshot:
http://xbox360media.ign.com/xbox360/image/article/888/888964/gears-of-war-2-20080714001316563.jpg
http://images.gamersyde.com/gallery/public/8897/1560_0004.jpg
But I do agree with him that Gears of War 2 seems to have better textures. But Killzone 2 has some very nice post processing. Really a toss-up of which one looks better.







