Which university program would be more beneficial?

[Morningstar6378]

Hello, as you can see in the title I'm trying to decide which offer is the best way to follow a career either as a software/game developer or pen tester. So far I narrowed my options to University of Western Ontario, Computer science and University of Waterloo, Mathematics. Even though Western is offering cs which is what I wanted, I heard that Waterloo is a better university for both math and computer science programs. To sum up, which offer do you think would be more beneficial for my future career desires?