Kiya hit it on the head.
OP made some good points but Durant is a 50/40/90 guy this season whilst being a v high scorer. If you look at career numbers Durant has a higher career points per game average. Rebounding is a wash for their careers,as is assists. I think Durant is a better teammate/locker room guy, although as others have pointed out Melo has matured in this area.
I think Durant is slightly the better overall basketball player.