Felton sends a cool birthday message to Radcliffe for his birthday, and it’s one Harry Potter fans should love. The Gryffindor/Slytherin rivalry is one of the defining aspects of the Harry Potter films. Anytime you see Tom Felton and Daniel Radcliffe, you can think about their multiple on-screen brush-ups and fights throughout a decade of movies. Even once the two former foes got closer on the same page, the Gryffindor/Slytherin debate has waged on, spurred by the fanbase. Yet, for one special day at least, Tom Felton says Gryffindor is greater than Slytherin.