Actually I believe Bama's will be equal if not bigger. Their site says their capacity will be 101,000 and ours will be over 100,000. It's all about how many seats we can fudge into the numbers.
Doesn't matter which one is bigger, what matters is which one is better, as in football team. Doesn't matter how many seats a stadium has if the seats are empty because of a mediocre team.
Considering how it will look in the long run, losing a few thousand seats to make Neyland nicer and more attractive to fans and recruits, I am for that concession.