It's not the correct comparison. When teams have over a month to rest, that levels the playing field. Take our 2019 Gophers, for example. Everyone was happy that they beat an SEC defense with 4 and 5* players, yatta yatta yatta. Well, we had over a month to rest.
Now, if leading up to the game against Auburn, how would the Gophers had faired if they played 'bama, Florida, and LSU the 3 weeks prior? Outside of Big Dan, I think our o-line would have been pushed around just due to exhaustion from playing a 4th SEC defense in 4 weeks.
That's the kind of grind I don't think B1G teams can handle. Week in, week out against SEC defenses. Fully rested, it's a different story.
Or a similar analogy would be what Chris Peterson was doing at Boise State. He'd schedule a decent P5 opponent, like Oregon, Virginia Tech, etc and beat them and then want to pad the resume with that. Well, the caveat was that he was always scheduling them for the first game of the season, when his players were fully healthy. Had his undersized BSU team tried playing a P5 team in November, they would have lost every time just due to lack of girth.