I think aside from the name themselves, all of these are considered top programs. Maybe U-Mich isn't mentioned as much. But I did interview at all the programs except U-Mich, so I won't comment on it. When ranking these places, you always need to think of what you are ranking it with respect to. Is it inpatient or outpatient, is it the research residents do, or is it the ability to attain certain fellowships. Almost no one in rehab will do every single subspecialty of cards, pulm, burn, TBI, pain simultaneously in their future practice. So if you don't know what you want to do, pick the one with the most breadth or flexibility, since the faculty at these places are probably all going to be great teachers.
In terms of overall breadth, flexibility to do what you want to do
1 Spaulding (most well rounded, unmatched number of electives)
2 RIC (again very well rounded, quite a few electives)
3 UW
4 Kessler (too few electives, esp outside of Kessler)
5 Baylor (too inpatient focused)
I would say strictly in terms of structured didactics and faculty teaching:
1 RIC & Kessler tied(both a lot of didactics/board review)
2 UW
3 Baylor
4 Spaulding (strong faculty, but structured didactics not quite there yet)
For research opportunities and supported by faculty:
1 RIC (most amount of research going on)
2 Spaulding (lots of research requirements, journal)
3 UW
4 Baylor (suprisingly I have heard residents complain of how hard it is to find a research mentor here)
I don't know where Kessler fits in honestly.
Then the next and most important question is what about the field I think I'm going to go into? If its EMG training or EMG fellowship you want to pursue, Mayo is best. It is also the only program I am aware of that teaches EEG also. If its anesthesiolgy based pain management, then Harvard has the best track record of matching its residents. If its SCI, then Kessler and Baylor are probably the top programs. If its stroke, RIC has tremendous faculty like dr roth, dr harvey, dr bogey, along with cutting edge research in stroke. If its professional teams sports you want to do, UW has Dr Herring who works in pro football. If you have no idea what the heck you want to do, then pick Harvard and you can keep taking electives until you find your niche.