I, personally, would choose Western primarily because I have family in California. Also, I have interests in internal medicine subspecialties, and Western graduates have placed at decent spots in California to do internal medicine over the years--there is a precedence for this, look at the match lists of the past few years. I didn't visit CCOM because while I knew it was a very strong program I wanted to stay closer to family and I felt that I could obtain my career goals--internal med. subspecialty--by going to Western. Overall though, I think that CCOM has a better national reputation (definitely a better mid-west/east reputation, which is where many DOs practice) and it shows in their match list. I didn't analyze it extensively but I would feel confident to say you'd find more placements in ultra-competitive specialties; take a look to be certain. I know CCOM gave you a copy of theirs; if you need western's for the past few years let me know.
As far as Western's hospitals, I hope current students comment on those and other aspects of Western. I do know that Western's affiliations have changed over the years, but the consistent placing of students at certain sites (such as usc, loma linda, ucla, uci) indicates that these programs hold western in good regard.
Western's exterior was not initially very appealing to me either, but I got over that; plus, there is a renovation in the pipeline that should beautify it a bit:
http://www.westernu.edu/news/landscape.xml
I never asked a legitimate source about the school's board scores, because I felt that the placing of students in good residency positions was an indication that there is nothing--at least flagarantly--wrong with them. Having said that, I would not be surprised if CCOM had higher scores and passing rate.
If you want to eventually go into family practice, cardiology, hematology, etc. AND you want to do your residency in California, I think it's a safe bet to go with western. I don't feel like I said much of anything useful; let's see what others say.