It was easier for me because for about a month before they combined, I had Sirius in my truck and XM in my car. Oddly enough, I picked out the same 4 channels in both. Hair Nation, Alt Nation, Lithium and Octane on Sirius. Boneyard, Squizz, Ethel and Lucy on XM.
i had sirius in my former van, which had the radio stolen from my parking garage, but i have XM in my new van. Xshub has XM in his denali and sirius in his MKZ [which is what xsboy is driving now that the Rav4 went to texas to live with its rightful owner, and which had XM]. so i am familiar with both, but some of my presets changed names or something and it threw me. did some merge and just keep one of the names or something?