Unless you want to specialise in dermatology where they actually heavily favour you if you are the dux of your university cohort. Otherwise, there isn't an obvious benefit from obtaining high marks like chinaski said. However, I have to argue that traditional forms of teaching does not constitute the makings of a good doctor. Meaning just because you have lower marks doesn't make you an inferior doctor and at the end of the day it comes down to your attitude. Being a doctor is also far from just memorising information as there is a patient aspect. I have seen many doctors with "high marks" have abysmally poor rapport with patients. I had mediocre marks but my patients love me and will continue to come back to see me. I am more a pragmatic type and would rather learn through experience and doing the work so being a doctor now helps from that perspective. Just remember everyone is different so don't conform yourself to one mould.