Smart or Dumb refers to how the radio talks to the Bose Amp.
Smart systems have better sound reproduction and use digital sound reproduction at the amp and in communication to the head unit.
Dumb systems operate like any aftermarket radio, and just send a pre-amp audio signal to the amp.
The numbers provided are the newest TNR part numbers of the 2 systems.
You can integrate a bluetooth system into your factory radio.
www.usaspec.com
I have one in my GMC, had one in my Saab, had one is my Esky, had one in my Buick, looking to put one in my Saturn currently.