Having been around both MD and DO grads for over 30 years, there are differences in their initial experiences historically. The MD schools are virtually ALL hospital based, with academic faculty teaching in their clinical years, with a smattering of community training from private docs. DO schools have a greater tendency to send their students to clinical years in private offices, depriving them of intense educational experiences provided in teaching hospitals. (Exceptions exist: Ok State in Tulsa has a teaching osteopathic hospital).

Also, generally DO students are more likely to be non-traditional students: late to the game, delayed entry secondary to failure to get into MD schools, etc.

All that said, I have had DO residents who made fine physicians and MD students who did not, but if choosing an entire population of graduates rather than an individual, I would choose in this order:
1) from accredited US schools,

2)a)from some European schools and b)Central American schools (Guatemala, Honduras), and

3)a) from some Caribbean med schools and b) DO schools in US. I left out Canadian schools which are generally on the same level as US med schools.

The initial people who go to Dothan will be, generally, those who could not get into a traditional, accredited US med school (UAB, USA).
In Virginia, those who go to the aforementioned school will generally not have been able to get into UVA or Medical College of Va.