Just to be clear, RB is not 'just like BiaB' in how it works.

It was a DAW that PGMusic added some BiaB features to.
It will generate a whole song, like BiaB does using a BiaB song and style (if desired), however RB needs to generate the whole song before playing, so you may sit there a minute if you regenerate all tracks. BB generates a little of the song and starts playing while still generating in the background.
Why doesn't RB do this? Simple; the generate feature was added to RB (not native) and RB also has to account for dozens of other tracks, maybe tracks with lots of edits or FX, where BB doesn't have to do that. So the linear song needs to exist for RB to begin playback.

More info:
When you open a BB file in RB you get 8 BB tracks. Those 8 tracks are classed as BiaB tracks in order to have this BB style generating functionality. You can easily turn that off and work on one at a time by 'Making BB tracks regular tracks'. Then using Generate only affects the selected track or region.
Or you can leave them as BB tracks and regenerate the whole song when you hit Generate (like in BB). But again, RB will generate the whole song before starting playback. This makes BB much faster for some basic song structure/style experimentation tasks.

But anyway, you not only get more than 255 bars (it's pretty much limitless, depending on what your computer can handle).
You also are not limited to 8 tracks like BiaB. Got a song you like, and want to keep the full BB song and add even more tracks? No problem. Instead of 8 tracks you have 48. Each one can be Audio, MIDI, Realtracks, Realdrums, or whatever.

Looking forward to seeing you in the Realband forum soon. smile

I do not work here, but the benefits are still awesome
Make your sound your own!