If you're comparing only the models, kz3 is probably better looking. The environments and lighting in the trailer look really good in call of duty though, not to mention it's probably 60fps, would look good in motion with everything animated.
I think so. There was nothing at Microsoft's conference that wowed me graphically. I was pretty impressed with the PS4 Killzone showing at Sony's event, however. It looked next gen to me.
Not even a comparison. The scale alone makes it way more impressive and that is not counting lighting, environmental effects, superior graphical touches, etc.