The books in my opinion are better cause there were a lot of great moments that weren't included in the movie. Prime example: In Prisoner of Azkaban in the book when there leaving the shrieking shack after learning everything about pedigrew Sirius is carrying Snape by levitating him and he's purposely letting Snapes head hit the ceiling repeatedly. That's funny would been great if we could see it in the movie but we didn't.

SS/PS Movie>Book
CoS Movie>Book
PoA Book>Movie
GoF Book>Movie
OoTP Book>Movie
HBP Book>movie
DH Book=Movie
In my opinion :D

The movies left out way to much