I agree, these two are far from being comparable, with only one thing in common, artistically speaking... Breakfast at Tiffany's. Everybody knows the movie, and even if never read, also the book. Well, I happened to experience both within two days. Hepburn is quite stunning indeed, but Capote's story has nothing to do with the movie. Of course, a movie is never like the book it is based on (it's always worse if you ask me). But here, apart from Audrey Hepburn's acting and beautiful black dress, I couldn't see a slight interest in the movie. I'm quite glad I read the book right after, the movie was enjoyable but the book is quite a masterpiece. And since one has nothing to do with the other (except for some character names and dialogues), it was easy to ignore the movie while reading the book. I would therefore easily say Hepburn and Capote are ex-aequo... even if on fairly different levels.