I just upgraded from 85D to 100D. Both had upgraded audio package. I did not expect any difference in sound quality, but.. the audio sounds better in the 100D. I usually listen to Slacker. Equalizer settings are the same. Sotware version of car is same. 85D was 3G whereas 100D is LTE, but I'm not sure that would mske a difference. Curious what others have experienced and/or think?