I was BIG into the graphic novels, and though I did like a lot of the movie, it just didn't quite work for me.
Looking at that alternate ending, I almost prefer it... simply because I just didn't buy Scott liking Ramona. I mean why?!
In the comics she was cute, fun and likeable. Here she seems completely unlikeable. It doesn't help that their relationship was rushed (unlike in the comics).
And I love Michael Cera, but he's not Scott Pilgrim. I have no idea who is... but it wasn't Cera.