So you believe where a Super Bowl is played dictates who attends?
It's obviously not going to turn it into a 80/20 split or anything, but I would think a superbowl in Texas would give Dallas a crowd advantage. Maybe the Saints superbowl in Miami was different because the saints were in it, but I knew lots of people that were not just loaded that bought scalped tickets, and I would think a lot more of them would have bought scalped tickets if the superbowl was in New Orleans as they wouldn't have had to worry as much about transportation costs and maybe not even hotel costs. Plus I think their story is good enough and Dak and Zeke likable enough that Dallas would get a much bigger split of the crowd that's not actually fans of either team (which I would guess is maybe 50% of the crowd?).
ETA: And if it's like the Saints, the suite owners will get dibs on the suite tickets, so I'm sure the Suites will title heavily Dallas with a lot of texas owners.
Again, not an 80-20 split or anything, but I would guess a noticeable advantage in the crowd.