A couple of things here...
1) A different recruiting philosophy. Alabama recruits boys that are naturally big and athletic. MT recruits boys that are small(er) and hopes they can grow into a bigger body without losing athleticism. It's SEC vs CUSA recruiting at its finest
2) Alabama is deep. They don't just have 4 and 5 stars on the field, they have them on the bench. Athletes everywhere. Sometimes I wonder if the Bama water boy was a 4 star WR on Rivals
3) Coaching. With respect to Stock (I love the guy), Saban is a proven winner. Only 4 times in his 19 years as a CFB HC has Saban had 7 wins or less. While I'm not as familiar (to be honest, I'm not familiar at all with Coach Stock's coaching methodology), Alabama's famed "Process", when followed, is among the best in the business.
4) DNA change in the trenches may keep the game close(r) but it more than likely will be a blowout.