By the data given by all four banks, their rates are pretty much the same. If you're looking for the biggest loan, the BMO would be your best choice, but if you had to pick another one, I would reccomend Scotiabank. Of course, this isn't 100% accurate, taking into account the school you're studying at or what you are studying or personal preference, but overall if you want the biggest loan, BMO would be your best bet.