Via Ben of mus-ok.
"I read the post about the Acidlab Bassline Impressions and remembered this site which has audio and spec comparisons of:
Syntecno TeeBee Mark III
Future Retro Revolution
MAM MB 33 mkII
Future Retro 777
ML-303 v3.0 Acidcode
AS TB-X TB-303
All the synths are playing the same line. Its pretty amazing how different they all sound. Not sure if thats a bad thing though..."
Title link takes you there. Thanks Ben!
Side note: the xoxbox is also listed as the Adafruit xoxbox. I know lady ada makes it, but I think this is the first time I heard of it with an Adafrut brand.