Either way, physically I don't see why he can't do most anything. I'm not sure he's worth $100 million as a press-man CB though, his strength clearly seems to be facing the QB playing the ball.
If we end up signing Samuel, I'd expect Gibbs to really start paying attention to how New England used Samuel and make those adjustments to get the most out of him. You don't spend $10 mil a year on a player and try to fit him into what you're already doing. If this signing happens, I expect to see Samuel become our cornerstone defensive player.