Hi there.
I suggest you visit each school, spend some time, and take an introductory flight, and see which one appeals to you more. Ask questions about possibly "hidden" costs such as landing fees and headset rentals, and assess how you are treated as a customer. OAS has a very different training fleet than OFC, so this may also influence your choice of schools. Remember - you are the customer!
Cheers, and good luck.
P.S. There is also the Rockcliffe Flying Club.