You really can't compare schedules and opponents even though we all get sucked into it.
I think you could take any player from Clemson or Alabama and insert them into the other team and they would keep moving along with the same intensity and efficiency. I cant say that I have watched a ton of Bama games but I would give the nod to Tua over TL. Other than that, both teams are fairly equal which is why Bama is the justified favorite IMO based on the QB position. Of course Clemson has a great coaching staff but Saban is just that much better, ie, the on side kick in Clemson v Bama part I where Swinney didn't know you could touch the ball without it hitting the ground.