Most of this is subjective. Since one game is jungle and one is desert, it makes it more difficult. What I looked at were the things that are in both games. Facial expressions, mouth movement with talking etc. Another thing I like to look at is grip. How characters pick up and handle objects (are they actually holding it or does it look like it would fall right out of their hands). Grass detail and movement.
As far as these things go, I think Crysis has better character animation in the face and the detail level is much better. As far as grip, I think Far Cry 2 looks better. Characters seem to have a much better handle on their guns and papers (although there is still some to be desired). Grass and foilage looked better in crysis. I think there was better independent movement there however, I was impressed with the way trees in Far Cry 2 swayed with the wind. I thought that movement was excellent if you looked at the tree on the whole.
As far as these things go, I think Crysis has better character animation in the face and the detail level is much better. As far as grip, I think Far Cry 2 looks better. Characters seem to have a much better handle on their guns and papers (although there is still some to be desired). Grass and foilage looked better in crysis. I think there was better independent movement there however, I was impressed with the way trees in Far Cry 2 swayed with the wind. I thought that movement was excellent if you looked at the tree on the whole.