My new car came with a SiriusXM radio. Long ago I was an XM radio sunscriber because at that time XM had much better audio quality and audio a compression algorithm that made XM sound better than Sirius. With this new radio am I getting the Sirius signal or the XM signal? I see that they still have both Sirius and XM satellites in orbit each using their own technology. I cant get any clear answer from their FAQ. They say there are three kinds of radios, XM, Sirius and SiriusXM, but dont answer what the last one actually is using. Thx.