With the Raptors, Gay will have more shots available to him, in a wider range. From what i've seen, he handles the ball real well, almost 3asts per game is pretty good for a forward. Even if he has the ball, you know he will look to pass to the open man and not always throw up a shot.
Defensively, i think he's pretty good. 99 DRting is up there. Lebron is 103.