The basic training remains the same, but there are cultural awareness courses available to members going in. Sometimes they differ among provinces, depending on the communities they might be going to police in.
When you spoke about specialized services, what comes to mind immediately for me is the availability of emergency response teams in northern Canada. In many cases...you mentioned hours, but it could be well over a day, depending on the distance and what's going on. We have what we call “containment teams” in place and negotiators specially trained to hold the situation until more advanced responders can arrive.