^ Oh.. I have a book that shows the entire making of the film and it says everyone was really pleased with the way Gene acted as Willy Wonka. I dunno if that is Dahl specifically, but it said everyone was very happy with his wild character.
I'm not saying the second one isn't more true to the book, but as I said before, just because it's true to the book doesn't mean it is better. Have you seen Wizard of Oz, and Return to Oz? It's clear Wizard of Oz is better, but Return to Oz is very true to the book, though it's actually a pile of crap.