At this point, there's probably 5 tiers of FBS conferences, but you have a ton of overlap at the various ends of the spectrum. For example, the Big 10 and SEC are a tier ahead of the Big 12 and ACC, but over half of the Big 10 could be swapped for any ACC or Big 12 schools and there would be no difference in the competitiveness or value of the conference. It's a smaller percentage of the SEC, but there are plenty of programs there you could say the same for.
Same thing happens at the bottom of the Big 12/ACC and the top of the MWC/AAC tier. If you swapped Tulane and Boise for Houston and Wake it wouldn't make any difference in the value of any of those leagues.
SEC/Big 10 (I think SEC is clearly a better football and basketball product, but Big 10 is a financial giant)
Big 12/ACC (Big 12 is better product in football and basketball, ACC has the biggest brands of this group - but also the weakest)
AAC/New Pac (new Pac will probably get the edge here, but AAC has some frisky programs)
Sun Belt/MWC (Sun Belt is starting to move into it's own tier - MWC could be sliding into the tier below)
MAC/CUSA (Shouldn't be part of FBS)
Oh shit. That's definitely a Mandela Effect thing. I was thinking they won the East in their first SEC season.