First of all, overall rankings have very little to do with rankings for any specific program. The most extreme example of this that I have noticed is the DVM program at Colorado State University. The DVM program is ranked 3rd in North America and 4th in the world at a university that US News has ranked 153rd in the US. However, the DVM program really does deserve its high ranking and is superb, and anyone who employs veterinarians knows this. The same issue will apply to business programs or any other program. The program matters. The overall ranking of the school does not matter.
Secondly, the difference between a ranking of 68 versus 44 is not meaningful. Both of them are very good universities. There are hundreds of very good universities in the US, and anything in the top 100 is a very good university. There are multiple very good universities that are not ranked in the top 100 in the US.
And rankings do not matter much.
I agree with other responses that you are trying to decide between two very good programs at two very good universities. Your reasons for wanting to transfer make sense to me. Your reasons for preferring UMN make sense to me.
This makes a lot of sense.
I think that you are doing well. I think that you made a good choice for good reasons. Relax. Get ready to work hard when you show up at UMN in the fall or late summer.
Over your career you will work with UMN grads and UW grads (for more than one definition of “W”), and no one is going to care which of these very good universities each of you attended.