It's the same basic cabin, just like the one we see flying in the opening credits of DS9. But the cabin can carry at least three types of attachments:-the cargo train (seen in TMP/STII, Generations)
-a pair of cylindrar grabber arms (seen in TMP/STII only AFAIK)
-a pair of angular grabber arms with two ventral "flippers"
The latter grabber configuration was originally designed for TMP by Andy Probert, but dropped in favor of the cylindrar version (Shane Johnson's "Mr Scott's Guide to the Enterprise" shows the original sketches). Apparently, somebody finished Probert's work later on. Perhaps he himself did for "11001001"? I have never seen a clear picture of the workbee in that episode, but from smudgy screencaps, I'd be ready to believe the 'bee had the angular waldoes mounted.
One could say that the angular, flippered waldo system is the 24th century version of the cylindrar 23th century device...
Timo Saloniemi