Different, but great.
This movie is the kind that a lot of people would have you believe didn't exist until the 90s; a hard, dour look at what war can do to some people, resulting in an expression of deep psychological damage.
The difference? War Hunt doesn't treat the protagonist like a circus freak, deliver a heavy-handed message about armed conflict or make you gag with corny emo dialog.
All in all, a really cool movie.