Sirius is more expensive but only slightly. And to me, the extra price is worth it because I can stream the music stations on my PC and I'm on one all day at work and much of the night at home. I'm not always in my vehicle, so it's nice to have that extra option. Aside from that, I think it's just a programming choice. I like Sirius a lot and I've had it for about a year. In fact, I'll have to renew because I can't do without it.
