Either there is less stock in the Canadian webstore, or Canadians buy more Club Monaco stuff, or a combination of the two.
Therefore, less stock makes it to the sale racks.
Also, there was alot more stuff in the Canadian webstore in the sale section around the end of December.
I think Canadian folks are more aware of the brilliance that is the CM sale section with the +30% off, or the +50% off.
Oh one last thing I have noted, the biggest difference in the sale sections...