Bennett competes in and wins the nation's best conference regularly with less talent than his competition. Tells me he's a pretty damn good coach.
But even more importantly at the moment, he's far more likely to be clean than Mack. Bennett doesn't usually pursue top shelf recruits...
[BTW, there are FOUR HOF coaches in aforesaid conference, and they individually had more raw talent than Bennett each year...]
I agree that Bennett is a hell of a coach. But given that baseline, the data suggests Mack is as well.