Parcells wins this one almost single handedly. I don't think Carolina will be able to move the ball on them, whereas Dallas will have an easier time of it. Dalls will have an easy time shutting down the Carolina passing game and because of it the offense will implode.
Sure, you'd be crazy not to take Davis; but he's no Walter Payton. I don't think he's good enough to single-handedly win a playoff game agianst Parcells--and that what it'd take in my mind. They don't have a passing game that will beat Dallas even one on one, so Dallas will be able to focus on stopping Davis.