i got the xm in the tl and i listen to it all the time, i have no clue what is played out on the regular radio. i never tried out the sirus, so i cant tell you waht is better but im mad happy with xm, but what i do know is that you can hear dj's like mendez and peters on sirius, but xm has like tiesto, pvd, some subliminal/sondos dj's, howells. and others.