With both XM and Sirius available through WhiteFence, it may be hard for you to choose between the two satellite providers. I have found this article on the HowStuffWorks Web site that describes the differences between Sirius and XM. Not only does the article briefly describe how satellite radio works, it also gives a side by side comparison of XM and Sirius in the categories of: Number of Satellites, Programming, Highlights, Equipment, Price, Availability and more.
If you have decided on which satellite provider you want, or you want to use the comparison engine found on WhiteFence, enter your address on WhiteFence.com to compare the satellite radio offers available and to connect to the provider you choose.
