Can we now frame these replies to the OP's original question: MD and DO rotations are essentially the same in structure, style and instruction. That is, you will have mentors/preceptors that expect you to actively engaged in the process equally in both MD and DO rotations. You will not be sitting in a corner and told to watch. In both cases you will actively learn medicine
As has been described above, the "quality" of the rotations can be different for several reasons.
1) MD schools tend to attract higher caliber instructors, students, etc, due to the selectivity in admission to the profession and this may lead generally to higher quality in both giving and receiving instruction. Conversely, DO instructors and students have slightly less selectivity to the profession.
2) MD schools tend to be better funded and associated with larger, more indepth teaching/university hospitals and thus more varied and indepth specialists as well as cases, thus having more opportunities for wide and varied rotation. Some DO schools, especially those in urban areas, are now approaching this level so the differences are minimal
3) Both MD and DO schools can vary across both types as individual institutions.
4) As the historical osteopathic hospitals are consumed by larger medical centers and residencies are merge, and the selectivity of DO schools continues to increase, it is likely that these differences will lessen over the next 10-20 years. BTW, this was the basis of "Physician 2015," a project started in the late 1990s to merger the MD, DO and DPM, which ultimately led to the merging of residency systems
In the end, both MD and DO students will receive similar general rotations instruction and will learn medicine at most institutions without significant difference in the structure or style.