The differenc lies in the philosophical approach of healthcare. DOs focus on a holistic approach, where the whole body is taken into consideration when treating a disease, regardless of how specifically local the problem mght be. Hence, they receive additional trainng in manipulative medicine, reflexology amd alternative medicine. The greatest charm in the DO philosophy is that they often work with people where traditional medicine fails... e.g. a person with untreaable cancer for example may find a greater quality of life with manipulative medicine than say, the oppressive doses of chemotherapy.
Either way, MD and DO philosophies work to achieve the same goal: deliver quality healthcare. You have to love what you're getting into to be truly happy and successful, so being unimpressed with one school of thought is a clear indicator that it might not be for you. There is no need to look for pros and cons. The best way to satisfy your interest with osteopahi medicine is to shadow an osteopathic doctor. In fact, it's highly recommended to anyone even if they've already decided to pursue an MD. I was amazed at a DO who did manipulative medicine on a patient with leukemia and her condition actually resolved in a few weeks.