Just a few counter-points to consider here! As an applicant who is also from Ontario, Mac would be an easy decision for me personally. Don't underestimate the value of having a strong support system nearby!!! Even if you feel Dal may be a better "fit" on the whole, the value from the support you'd get by having family and friends nearby is worth thinking about carefully. I also think that you should think about where your interests in medicine lie. Yes, it is possible to match to more competitive specialties from Dal, but this is largely a primary care focused school, with a majority matching to family med or other primary specialties. If that is not what you're definitely interested in, it's worth thinking about that too. Mac is ultimately a better ranked medical school, and it's definitely hard to know exactly how that may shape the opportunities you may have, but worth noting and considering imo. Congratulations on being accepted, and best of luck with your decision!!!