The new prices include duty fees.
I am pretty sure limba speaks the truth. I stopped ordering from Rapha because they continued to use a low end FedEx service to Canada, where on top of the taxes (to be expected) you also pay the ridiculous brokerage fees (which most Canadian's are unfortunately no strangers to). Personally I wished they would use Parcel Force, or Royal mail (like PBK, Chain Reaction), and emailed them about a month ago on the matter. They promptly responded to explain they were changing things around in the next month to have the duty/taxes included, and their shipping page now lists package coming via DHL and no longer FedEx.
I have no clue whether or not DHL charges these fees, but it sounds like they are at least taking the right steps to try and have no surprises at the end of the road when their packages arrive for their customers. This would probably explain the price increase in CAD specifically. So even though they seem more expensive up front, you would have paid the same (or more) by the time its on your door step.