US vs Canada IB

I'm a semi/non-target student who just landed a SA 2021 position in Canada at a pretty well-known bank. I'm super grateful and am really excited to start next year but can't help but continue to look into the future.

A few kids from my school have extended their degree to take an extra summer and go to the states to get into a BB and I wanted to know what the benefit of this would be/what the difference of being in the US vs Canada would be? I'm not even sure if I want to do this and thought about it a bit so wondering if anyone can give me some insights