Take this as all that it is, a few antecdotal stories. Feel free to disagree but at least rebuttal with something more convincing then "🙄"
From speaking with multiple attendings at work and shadowing and PHDs/advisors at my undergrad, CMS does not have the greatest rep. A few attendings I work with who went to UIC and NW named it as being a school rich parents would send their kids to if they couldn't get into anywhere else. To put DO vs MD into reference, one of the guys I shadowed is a big name in the city and he said he'd prefer to work with CCOM trained students anyday over RFU.
For me though, I'd be torn. As much as people on here will say there is no bias anymore, there is still an "old boys club" that the MDs have. I have been working in a hospital for 3 years and have seen and heard it multiple times myself and that is all that is needed to turn me off. Of course I could also go across town and work at the DO hospital and probably never hear it, but that is also the one NOT connected to big time research and medical school.
I think the most important thing is to find the school you feel most happy at and about. You'll be able to do whatever you want at either one if you work at it, just make yourself happy first because you are picking a school just as much as they are picking you.
I'm not sure what kind of factual rebuttal you expect to that motley collection of slurs. Your first characterization of CMS is absurd. Feel free to have a look at this year's MSAR; please note that the average GPA and MCAT are the same or slightly higher than other schools in the Chicago area such as UIC, Rush, and Loyola, and of course CCOM. It seems these rich parents are also buying good grades and MCAT scores for their incompetent, overprivileged offspring before packing them off to CMS.
CMS' main drawback is one which it shares with CCOM; it doesn't have its own exclusive hospital. CMS students do clinical rotations at a number of well-respected teaching hospitals in the Chicago area, some of which are shared with CCOM.
For some reason people have the idea that CMS has high tuition compared to other schools. While this was true years ago, and was part of the reason CMS was on probation in 2004, it's no longer the case. CMS tution is about 4K cheaper per year than CCOM or Rush. However, DMU is considerably less expensive than any of these.
In summary, here's how I see things. If you believe that MD is preferable to DO, for whatever reason, then CMS is preferable to an osteopathic school. For some reason this discussion is always framed with the subtext of "worst MD school vs any DO school", which is absurd. As I mentioned in an earlier post, based on things other students have said about their schools' policies, I'm glad I'm at CMS instead of a fair number of other MD schools.
I know very little about DMU. For some people, being in Chicago vs Iowa will be a factor. I have no idea how MD residency directors look at DMU. Contrary to commonly held SDN belief, this almost certainly varies from program to program, based on their prior experiences with a given school's graduates. If you believe that residency directors see the schools as equivalent, then wouldn't you choose DMU for financial reasons, all other factors being equal? Personally, I have the impression that DO students are generally at a disadvantage in the MD residency match, but I could certainly be wrong about this.