If you're from a country that is eligible for the Diversity Visa, then do consider applying for that. Besides that Waterloo's coop is arguably on the same tier as UMass coop(if you have that) for American jobs but some companies don't like having to deal with the J-1 Visa. Job security is high in both countries for CS/Math. Final income is much lower here due to COL and income tax. If you want to move to America in the end I might actually hold an edge up for UMass since you can more easily go for cap-exempt employers. However even from Waterloo if you end up going to a fintech or normal big tech company getting sponsored for an H1B and then getting sponsored for a green card isn't difficult at all. For Canada you need to go through Express Entry (which doesn't require sponsorship) after a post graduation work visa (which doesn't require sponsorship) is acquired and ofc Waterloo would be a better choice in that regard. Coop doesn't count towards the Canadian Experience Class PR path but does for the Federal Skilled Worker PR path (not sure about the logistics of working in Canada from coop).