This question happens to be one of the hardest questions I think I will ever have to answer. I at first thought the book was better. Then, I saw the movie. I was completly in love with it.
But, there were some of the key componets that the book had and not the movie. Like Madge was not even included in the movie. And how at the end of the movie the mutts where supposed to look like the deceased tributes, but instead they looked like a naked mole rat mixed with a dog.
But in the movie, there where some ecpetional scenes. The forset fire scene always had me jumping, the scene when they where in the tribute parade on fire was out-standing. And the cliff-hanger at the end, left me breathless.
So to fully answer the question, I could not choose which is better. but if i was needed to i would have to go with the the hollywood intrepretation. The movie.