No idea if you get the US B006 Kindle which has an AT&T SIM or the international B00A Kindle which has a Vodafone SIM. Apart from the SIM difference, the Kindles are the same. You get whatever SIM is more appropriate for your country and I don't know what that would be for Canada.
The coverage map for the
US B006 AT&T Kindle and the
international B00A Vodafone Kindle aren't the same for Canada. If you're in a big city then either one will be fine though.