Of course, the demo was probably going to be more polished in it's final state, but I like the TITN version better. And by the way, correct me if I'm wrong, but I think Christine got writing credit as well - in the demo, there's a lyrical hole for "The light that shines..." bridge part.
Another one, I don't know who's heard You And I Part II sung by Christine, but I believe she actually wrote that one as well. It sounds as if it was changed to be part II because where the "you you you you you and I" part is, Chris sings "if you will love me today". It's a really nice rendition.
-Brian