You can't be a Psychologist in Quebec without having a Masters. A Bachlor's will let you be a counsellor (marriage/couples for example) and you can even work for the Government as a parole officer (I know someone that does that, very good benefits and decent pay)..
It's good you're going to Concordia though, since they have a more human relation type field. They're experts at social sciences, at McGill, it's very dry material. They're alot more research orientated. Know what I mean? Also, apparently, 20% of Mcgill students are actually from Montreal, the others come from different provinces and are from the USA. I know someone that graduated there in Languages, she said it's like those American Universities you see on TV. While Concordia is more layed back, she actually is going into Law at Concordia next year, so you have an idea what's up.