Not sure if I've posted my thoughts on this before, but my opinion on books v.s. movies, never differs.
Every time, it seems to be books for me. I feel that this is because when I read a book, I have my own characters, places and even voices in my own mind. Then say I watch a film, I'm always disappointed with how it turns out. I'm not sure if this would change with watching the film to it, before reading the book, I may have to check that out!
I do however have one situation where I have so far preffered the film to the novel; and this is the Lord Of The Rings. I can't really judge yet, though, however, because I've only read The Hobbit so far. Although I really enjoyed the films, so the books will have to do a lot to beat it.
Don't all beat me up on that one yet until I've read them all.