Nothing just smaller and cheaper- its meant to be used with a stereo system instead of being a stand alone speaker
The Echo cost nothing. Ok, we had to drink a bunch of wine and eat dinner at Cooper's Hawk, and also lug out a portable Bose speaker my wife also won, but other than that was no cost.
It also has bluetooth, but not sure how I connect that to my receiver. There's probably a device out there somewhere I can use to connect them.