Mainu GB zyada vadiya lagdi aa. I will be a little straightforward here, if you honestly want to go there for studies, University should be the choice, but if its for PR, college it is. But then its not like they are inferior in any sense, even when it comes to studies. Only thing is/difference is employment rate is different among different colleges. Employment rate depends upon various factors and one of such important factor is "reputation of the college". Main GB da zyada naam sunya hai Mohawk naalo ais mamle vich.
But I have got a suggestion. If its feasible with you, apply to both of them and jisda Letter of Acceptance chetti mil jaandaa osde bases te visa apply kardena. This is not the time to hold on and check which college is better. Infact once you get the study permit, you can change college and course (as read and heard from various people, once you are in canada you can do that).