DESCRIPTION:
By request I prepared a quick and dirty outdoor comparison of both speakers.
Bose was playing near maximum already causing a bit of distortion, the TDK A33 can play quite a bit louder (it reaches moreorless the same level of the big Soundlink), but the TDK A33 sounds overall more lifeless, dull and unspectacular regarding its bigger size.

The A33 has also severe battery and charging problems. I have had 2 different samples and both were not able to play longer than 10 minutes at their maximum volume.

Indoor comparison will follow soon!