If I understand what are you asking....then it is a little iffy for me.
I mean sometimes I like to read the manga over watching the anime. Then again sometimes the anime is much better. It depends on what kind of anime/manga. I think action types need to be seen on the screen, while romance, and things of that nature are better captured in the manga.
When it comes to just normal movies compared to the books....I rather watch the movie. I am not much of a reader outside of my manga, and Japanese related novels. the only book I read instead of watching the movie was Memoirs of a Geisha...and I am glad a read the book ^^ the movie was not that good to me in my opinion.