For multiple reasons, Kirby Smart and Nick Saban will always be compared to one another. The two worked together for years at Alabama, with Saban as the head coach and Smart as the defensive coordinator. And then when Smart left for Georgia, there were plenty of high-stakes matchups between them, mostly won by Saban. The one difference that’s easy to point out is the age factor. Saban recently retired and took over at Alabama in his late 50s. Smart has yet to reach the half-century mark and has already climbed the college football mark, twice. ESPN’s Paul Finebaum believes when factoring in ag…