The Washington Post does a side-by-side comparison of the on-air presentation for the services of both satellite companies (free subscription required).
XM, Sirius On-Air Style Compared
XM, Sirius On-Air Style Compared
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XM, Sirius On-Air Style Compared
The Washington Post does a side-by-side comparison of the on-air presentation for the services of both satellite companies (free subscription required).