Hedo's a beast, nice and quick release, plus he's a tall guy -> can easily shoot over defenders. Especially from the midrange...
Gordon's just too short to play SG, because you have to be really open to get an uncontested shot up with him. But I've noticed shooting a fadeaway helps with Big (Small) Ben. Creates a nice little separation and he's also got a silky smooth set of fadeaway animations, so it looks and feels good to pull that off...