Meant to answer this earlier. The plug-in came about a couple of years before the BBMO was adapted by Singular Sound so that might partially explain why the difference in appearance.
With what I said above, that probably also explains why the plug-in Emulator cannot be configured to resemble the BBMO in appearance and exact one-for-one functions.
I’ve not been able to use the plug-in on my Silicon Mac for a couple of years now (either Logic Pro X or Reaper) however, I believe the plug-in still works in earlier versions of the macOS. In order to use the plug-in, you have to make the drum sets available to the plug-in so that it can use and edit them. You’ve read the instructions already but if not, here’s a link Announcement: The First BeatBuddy Plug-In for your DAW (FREE BETA). As you edit one of the default drum sets, the BBMO will “see” and use the same drum set where you can edit it further or synchronizing it to your SD card.
If I’m wrong in what I’ve stated above, I’m sure Brennan will chime in to correct or clarify what I’ve said.