VCOM gives you a guaranteed seat in their DO program once you meet the requirements. About 60%+ make it to their DO class (according to past stats).
At LECOM, you need at least a 3.0 (both terms) for an interview, this does not guarantee a seat. However, if you make 3.4+ in the first term, you get conditional acceptance and will need to keep 3.0 or above 2nd term to keep the acceptance. Their current class, out of 170 students, about 70 of them made it to the DO program.
I don't know about Touro-CA, but in Touro-NY, you need a 3.5 gpa and a pass on the comprehensive exam in order to matriculate. Also, their exams are graded on curves, which is the worst part of their program.
Not sure about MUCOM, either.
Between VCOM and LECOM, I would choose LECOM because of the federal loans, but between VCOM and any other school, I would choose VCOM for their already established postbacc program and their amazing DO school. The difficulty would be the more or the less same though, regardless of where you end up!