I think trying to compare across media is impossible. Films cover different aspects of a story than books do. Then, books can go into much more detail and have much more complicated and complex story lines. Films can only show what actions are readily available to the viewer. I have never been satisfied by a film from a book that I had read before seeing the film. I have been satisfied by films that I have seen first and afterward read the book. For instance, I saw 2001: A Space Odyssey before reading Clarke’s book. Had I read the book first, the movie wouldn’t have been so mind blowing.