I doubt Phil will use two drivers because he's going to need that extra wedge around the greens. He will probably go with the driver he cuts, the one he can hit fairways with. Because Tiger's ball stays in the air so long and a lot of the holes have a bit of dogleg and some undulation, he's going to have a hard time keeping his drives in the fairway.
Both Tiger and Phil can hit the ball high and stop it pretty quickly. Let's face it, though: Long irons are one of Tiger's strengths. No one since Jack Nicklaus has hit them like Tiger. Phil also hits long irons well, but sometimes he gets a little too aggressive. Tiger is better at aiming away from the flag and getting the ball on the green.
Phil's wedge work with Dave Pelz has paid off. I don't think anybody's better from 150 yards and in. Tiger still has issues with distance control, but he's awfully good as well. Phil has the edge because he has more control when he takes spin off the ball using that little three-quarter shot. That'll be valuable when he's playing to a back pin.