I think Chouji should die. I don't wan't it but it would be reasonable, specially for that reason that Chouji said that he will definetely die if he takes the red pill and he did. So it would be right that he would die. Neji shouldn't die and he doesn't, he just passed out.

Btw: those pills Chouji took. Man, are those something or what. Think about that when Naruto would take one... 100 times stronger that original.. uuh.. Naruto would kickass harder than ever. Or if Kyuubi would take 10 of those pills... whoozzz!!