I should have noted in my original post/question that I have used BIAB in the past (version 7), though not recently. I am aware of the nice job it does with generating MIDI based songs. But the RealTracks sound much better to me, based on listening the demos. Part of that is that my MIDI sound module is mediocre (Korg X5DR), but I also think the generated patterns are better with RealTracks - closer to what I hear on the radio.