Both McGill University and Concordia Universities are known for their top-notch finance programs. One of my friends shared his experience at his finance-related job. He told me that he was hired just because the other candidate was a graduate of JMSB. 

Concordia gives you more hands-on experience because even undergrad students manage multimillion-dollar portfolios, while McGill has more brand value. This may give you an edge in international prospects especially in the U.S. since most Americans don't really know too much about schools outside of their country.

I know many companies in Montréal that specifically ask for JMSB and HEC students, but I have never heard much about McGill's finance program. So, from the limited information I have, lJMSB has a great co-op program and hands-on experience while McGill is typically more ideology and theory focused, based on its recognition.

Ultimately, the decision of which school to attend will depend on your personal preferences and priorities. It’s crucial to go for the school that best aligns with your career goals and personal needs.