re: Explain these two rankings to me please. I am open to solid arguments changing my mind.

You may not like this, but the committee looks at a lot of things, here is a short summary of why Wisconsin might be higher than Florida in their eyes.

Florida beat #11 Auburn, 24-13, lost at #2 LSU, 28-42, and to #4 Georgia, 17-24, so they are 1-2 (.333) against ranked teams, played 2 FCS teams, which is a negative, and beat 3 teams with a winning record.

Wisconsin beat #14 Michigan, 35-14, #16 Iowa, 24-22, and at #18 Minnesota, 38-17, lost at #1 Ohio State, 7-38, at unranked 6-6 Illinois, 23-24, so they are 3-1 (.750) against ranked teams, played no FCS teams, which is a positive, beat 4 teams with a winning record.

Overall Wisconsin’s resume comes out ahead on those facts. But the committee looks at far more.

The committee uses the SportSource Analytics Rankings Tool to compare teams, which you can do at https://sportsourceanalytics.com/rankingtool/

I started a thread that shows how you can play around and look at different things with that tool at:
https://www.tigerdroppings.com/rant/more-sports/how-the-playoff-committee-uses-data-to-place-teams/87166480/