Unfortunately, both have rather low fidelity.
When Sirius and XM combined, I hoped it would offer a wider music range, but it turned out to be the opposite.
I let my subscription expire years ago.
B
@gdnrbob, I agree their streaming quality is very low sound quality.  Maybe the combined SiriusXM and Pandora Company will offer uncompressed streaming options.   

And, maybe SiriusXM should also buy Tidal Steaming to give it some needed funds.  QoBuz is going to great competition to Tidal.  And, QoBuz offers 24-bit albums..   Interesting times.