Well, at my school the med students take 3 courses while the dents take 9 (including the 3 the meds take). The meds are out of class by noon, the dents are out by 5. In some respects the courses that the meds take are a bit more in depth than the courses the dents take. Both are difficult and different. It would be hard to say which is more difficult, although I would think dental school is. We not only have the didactics but also a clinical aspect to work on throughout school. The clinical aspect saps up a lot of your time and your hand skills must be up to par (or become so) in order for you to complete your work, adding a dimension that the meds don't really have.