Do a search on the topic in the physician-scientist forum. Short answer, in terms of the PhD, osteopathic schools do not have the depth or quality of research that allopathic schools have, and DO, PhD do not offer full stipends and tuition waivers like most MD, PhD programs[/QUOT
Why don't they have the quality of research?
Well basically DO schools are primarily clinically interested and newer. It's similar to the Psy.D's in the psychology world. They spend less time doing research.
Simply being said if your interested in research an US MD is your best choice. Not to say that there aren't DO's with strong research and being tenured in some medical schools. It's simply a lot easier to go into research as a MD. However if your just interested in being a doctor and treating people, then it doesn't matter.
Btw this is directed to sword boy.