I had to construct a spreadsheet this evening and it took quite a while. I see what you guys are saying. All the French channels are there. What hit me first is that you dont get the Best of XM with a Canadian subscription.
I also noticed that with Sirius, 6 channels (SIR 1 to SIR 6) are available on XM Radio. Unfortunately, the only way you can hear them is via internet, which sucks. Another difference I noticed is that Sirius Canada, supposedly has a different doctor channel than Sirius USA and you can't get the US traffic or Weather Emergency Channel on the CDN subscription. With XM, you're stuck with 32 kbps audio (not a problem with talk programming) but not acceptable for music. With Sirius, you can pay an additional $2.99 US and get 128 kbps. This is a noticably huge jump over the 32 kbps that XM and Sirius basic has.