Congrats on your acceptances!
I'll be attending MUCOM next fall so I'm probably too biased to compare the schools. Choosing a med school is a very unique personal decision, so here are some things that I have found helpful in considering before selecting which medical school was right for me.
Which school is going to allow you to do your best and best prepare you for boards/residency? Important things to consider are academic curriculum, board preparation, and access to early clinical exposure.
Which rotations will best help you get into the residency spot you want? If you want to practice in a particular region and/or want to practice a certain type of medicine (e.g., rural, urban, etc.), look into which program is strongest in those regards.
Additionally, consider what resources/support are available at the school and in the surrounding area. Med school is brutal, so you want to go someplace that you think will have the most emotional support (e.g., is the school close to family/friends? Does the school have great academic/personal support? Is there a vibrant campus life/student body? Does the surround area have great places to 'recharge' your batteries after a long week of studying? etc)
Finally, if finances are a major factor in your decision-making (personally, they weren't for me because I knew I'd most likely be taking out a huge loan no matter where I attended), this is definitely something to look into. Calling each school's financial aid counselor is really helpful.
Good luck with your decision and congrats again.