The Bluetooth model came out in 2016 (I got mine about a month ago), there are some changes to the design, the main audio plug in the back is a lot better. The specs are really close but not quite the same as the standard Promedia 2.1. The BT version does not have the THX badge. I think the satellite speakers seem about the same, the change looks to be in the subwoofer, amp and crossover. I use it plugged into the computer but have listened from my cell phone via BT as well. I am very happy with the speakers, I have owned Logitech, HK and Altec Lansing computer speakers and these are much better.