Compared
Canadian college or university: which should you apply to?

The short answer
A Canadian college teaches applied, employment-facing programmes, usually one to two years; a university teaches academic degrees and is the route to research. The decision is not about prestige but about what you already hold: a postgraduate certificate below the level of your existing degree needs a content argument a visa officer will accept, and that is where most refusals originate.
What each is actually for
Colleges run diplomas and postgraduate certificates built around a job outcome, with co-op placements common. Universities run bachelor's, master's and doctoral degrees, and a thesis-based master's is the route into research and into funded study.
Neither is a lesser choice. They answer different questions, and the mistake is choosing on admission odds rather than on which one your plan actually needs.
The progression problem, which only affects one of them
If you hold a four-year degree and apply to a one-year college certificate, an officer will ask why. That is answerable, but only with content: what the certificate teaches that your degree did not, and what the combination lets you do. "Better opportunities in Canada" is the answer that gets refused.
A master's at a university rarely raises the same question, because the progression is self-evident. See why study permits get refused.
Check the permit consequences before you choose
Post-graduation work permit eligibility now depends on the institution type, the delivery model and, for college graduates, the field of study. Programmes delivered under public-private partnership arrangements lost eligibility for permits applied for on or after 1 September 2024.
These rules have changed repeatedly since 2024. Verify against IRCC and the institution before accepting an offer rather than against any article, this one included. The college pages carry the same caution per institution.
Related questions
Is a Canadian college diploma worth it after a degree?
It can be, where the programme teaches something your degree did not and leads somewhere specific. It is a poor choice when picked for admission odds, because the same weakness that makes it easy to get into is the one a visa officer questions, and post-graduation work permit rules now depend on programme and delivery type.