Both defenses are great, Bama is probably a tiny bit better. Bama is the better running team but I prefer LSU in the pass game. Plus Les Miles is a dangerous head coach, he is gonna put all his cards on the table. Bama is at home so that is an advantage for them.
My brain tells me Bama by a TD or less, my gut tells me LSU finds a way to pull this game out in the last second. Either way, it should be epic.