lol, I am also planning to do biomedical science, which the Atar would be below 85.
medical science would be more about science ( chemistry, physics, biology, and maths) whereas, biomedical science is very research and practical course based. IN biomedical sceince you like research diseases. which is biomed is very interesting, you also learn about cells, disease, you can resaerch all that.
I can't tell you enough how interesting biomedical science, is you get to become a biomedical scientist, if you further study in the context of medicine. biomedical science is all about biology and the human system.
good luck, where are you planning to do biomedical at, please let me know I am also interested, say if we do biomedical science together at UTS, then how are we going to transfer to medicine, UTS doesn't have medicine degree I think. Are you going to then transfer, to a different uni. This is my main concern.