Pre-clinical medicine (especially year 1) will be very similar to a lot of courses in the field of biosciences. Here at Cardiff first year content is very similar to biomedical science, microbiology, genetics, etc. The only real difference is that we also do anatomy and some of the doctor stuff such as a few placements.
However, I think a lot of what we are taught in years 1 & 2 will be forgotten by the time we are doctors and isn't strictly relevant to what we'll be doing. Where as biomedicine graduates would have had more extensive basic science teaching and therefore I should imagine be far more knowledgable in the science underpinning a lot of modern medcine than what we as medical graduates would be.