I am also in a similar situation as you. I was accepted by UBC and rejected by York MA Politics program. (Which is weird since I thought my deeper background in Marxism and critical theory would give me an edge.) However, for me it is more about picking Canadian vs. American institutions for my MA. The tuition for UBC on top of the TA bonus is really attractive, but if my plan is to stick to the academia and go to U.S. institutions for a phD, then the extra tuition may be worth investing from the perspectives of an international student. (non-American and non-Canadian.) In the U.S., I have been accepted into UChicago MAPSS, NYU, and UCLA. Their tuition are all about the 40-42k. Interestingly, it is my Asian parents (who would be the ones paying my tuition for graduate studies) who prefers the U.S. programs without any hesitation. For them the prestige the U.S. universities carries outweigh the costs.
My undergrad background is in mathematics and philosophy, and my main concentration is political theory. Although my interests in the past year have been gravitating towards political economy over ethics. I also have a solid background in East Asian affairs, and I heard UBC is one of the strongest in regional studies.
Lemme know what you guys think~