Mason Verger (Gary Oldman's character) was even more screwy in the books. On that note, the book ending is very different from the movie ending; it got quite a bit of flack from the fandom. I was just happy to see Lecter you-know-what Clarice at the end of the movie.

Honestly, I don't know which movie I prefer. Silence has more of a subdued, quiet brilliance I love, but Hannibal was more grandiose, and that you-know-what finally happened. I'd have to say overall I prefer Silence.