BAIB can't sync to external Midi clock
RB can.
But RB doesn't treat realtracks like realtracks.

I use BAIB for live performances. I can loop, and adjusts tempo's on the fly, if the singer starts snapping her fingers that she wants the song faster or slower.

I'd like to do more tracks live, like with RB. But I can't because the benefits of realtracks are not the same as BIAB.

The problem with BAIB is the tap tempo is terrible compared to other tools out there. Try in the middle of song to adjust the tempo via tap. Then try it with Midi Maestro - it's perfect. If I only use midi tracks with RB - then I can exactly follow tempo.