Yes, it is monumentally different. Kerk was 10xs the recruit. It wasn't development he ever needed. Simply the health to be able to move like he wanted and get his body to the right size. Ker was ALWAYS a better wrestler than Cass. He simply didn't have the mobility, size and strength yet because of the injury issues. Once he was healthy his trajectory shot up super fast.
Meanwhile, Davison is now in his 6th year and is simply the same wrestler he has always been. Very good, but 2nd to 3rd tier at 285. Which is why he has gone R16, 6th, 5th and Kerk is now 7th,4th,2nd. Davison also benefited greatly from bringing a lighter weight wrestling style up to 285. However, he simply isn't as fast or athletic as Gable, Parris and Kerk are so his style doesn't work on Cass.
So, I just don't see Michigan all of a sudden making him faster or more athletic. Because those are the type of improvements that would be necessary for him to all of a sudden start beating Tony...