A few unorganized thoughts....
-They are different coaches. CNS excels in the tactical aspect of the game is also a very good motivator. CPB excelled at knowing people...his players, surrounding himself with great coaches...and was very good at overall strategy.
-CPB built the foundation that CNS has built his success off of. Alabama has the resources because of CPB and CNS makes good use of them.
-CNS will never have the opportunity to affect the bigger picture (The university itself as a whole, the state, and the south in general) the way CPB did.
In short...CNS could never be CPB nor should he try to be(nor do I think he does). It was a different era...and CPb had such a social effect that was so much bigger than football. I wish people would simply see this as I believe both men do/would and that is that they both did their best to win games, conduct themselves in a manner that reflects positively on the university, and do everything they can to positively influence young men both on and off the field.