Don't let one Iowa fan (PrairieHawk24) take this down a rabbit hole. Great discussion when we keep it out of the gutter.
My contribution...
(1) Gable and Cael are/were both great coaches. Gable changed the game (yes, I called it a game), and the landscape in his time by doing something different than everyone else. Hard-nosed, offensive-minded, dominate-your-opponent wrestling, by training harder and improving technique better than anyone else in the country. It was called the "Iowa Way", and it was real. Other teams were left in the dust, and played catch-up.
Sound familiar? Different era, different time, but Cael has brought the same change-the-model thinking. Just as intense as the Iowa Way, but brought a lot more FUN into the equation, and pushing offensive-mindedness to an entirely new level. And again, everyone else is playing catch-up
(2) Comparing the "numbers" is fruitless, imo. Gable won this many straight Big Ten Championships, or that many NCAA Championships, or had this or that "number of anything", fans want to use for comparison. It's what we do...and that's ok. Just understand that it is a different time. There's no longer 146 teams (1981 number), there's 76, so talent is more concentrated. The number of scholarships are different. Recruiting is different. NCAA Rules have changed over that time. You name it, everywhere we turn, the factors are different. As an example, other than Iowa, the Big Ten didn't have a single other Big Ten team finish in the top-10 at NCAA's for 4 of Gable's first 12 years, and the conference averaged about 1 other team. From 2010 through 2018, other than PSU, the conference averaged 4 other teams, and never had fewer than 4 total. I could make arguments for and against this fact, and how it is a factor in Gable's favor, or in Cael's favor...but the point is, the landscape has changed.
(3) I don't believe, for a second, that Gable intentionally cheated re. scholarships. I just haven't seen enough evidence that proves it. Granted, there were more scholarships in his day, as androcles pointed out, and NCAA Rules were different, but everything I read points to administrators blowing it, not the coaches. I'll exclude that thinking when making a call on the better coach.
(4) So, what do I think, after considering everything, big-picture-style. It's a cop-out to some, I just think there's room at the top for both. However, if I was forced to decide, I'd give the edge to Gable, and use National Championships as the only measure. Too much noise (statistically speaking, the data is confounded) in other measures. Create the vision, then recruit, teach, train, instruct, advise, guide, etc...Cael does it all better than anyone today...