I think those are the worst Crysis screens I have ever seen. Same with the video. A very poor comparison in my mind.
If you have played Crysis it's not even a question. Killzone has small, simple and linear industrial environments, while Crysis has a massive, detailed jungle setting.
I saw someone arguing that Killzone 2 has more advanced lighting. Come on now! Killzone 2 uses alot of pre-cooked shadows and not at all as advanced lighting technologies as Crysis.
So what tech do Crysis lack in comparison to KZ2? If you make that statement you have to give some backing to it. Otherwise it's just a fanboy opinion like everyone elses.