Yes, there is a difference. If I remember correctly, the rate of increase for the CPI in Western Canada was of between 3 and 3.5%, because of the robust housing price increase, which is included in the CPI. In Ontario and Quebec, the CPI rate of increase — I could get my hands on the exact numbers and prepare a graph — would be closer to 1.5%.
On April 30th, 2008. See this statement in context.