Marquis is a slight negative on the offensive end, and a slight plus on the defensive side of the ball. Though if he gets a smaller PG or SG on him he's got a very nice post game.
Tony is a bigger negative on the offensive end, and a bigger plus on the defensive end.
Neither is as good as Ray Allen overall. Even worse, neither can shoot from further than 12 feet reliably. So they can't fufill Ray Allen's role in the plays, Eddie has to do that. (or Sheed lol)