It primarily depends on the country you want to be settled in finally.
Rotman is the TOP Program of Canada and you get an opportunity to interview with the major consulting firms and investment banks within that region as you are joining the LOCAL KING. However, it may not offer you opportunities in Tech. So, you got to ask yourself how important are your ambitions to be in the technology industry.
Olin: it is again an amazing program, and if you want to be in the U.S. and a country is more important, join OLIN. You may not get to interview with the giants as U.S has many MANY other competitive schools for the top recruiters, but you will be in a larger economy( U.S. Vs Canada).