At least Southern plays in front of a stadium that is close to sold out every weekend. How would Tulane have fared against West Virginia, Western Michigan and Georgia this year? We saw how they played Tech last year and how would Tulane have done against Navy and NC State last year?
Granted, the AAC is a better league than the Sun Belt. But the bottom of the AAC isn't better than the top of the Sun Belt. Football means something at Southern and in Statesboro. It doesn't seem to mean a whole lot at Tulane at the moment.
Academically, the top students at Southern can hold their own with the top students anywhere. Are there as many at Southern as at other places? Maybe not, but the best there can be the best anywhere. For instance, my senior year roommate. Southern grad. Got a PhD from Duke. My other senior year roommate? Went to vet school (at Georgia, unfortunately) and has a huge practice.