Not knowing how well you know BIAB or what version...

BIAB has A/B part markers. Many of the Midi styles use different volume levels for the markers. The A markers are usually 'quieter' and B are 'busier'. The RealTracks also have variations A/B, Simple, Very Simple, etc.

Matt has a good point about the Aebersold arrangements sound the same each time. But if you put a BIAB arrangement on CD, it will sound the same each time also.

R