If BB transposes the RealTrack to fit it's not an accurate representation as it comes up on the the video "Transposed x semitones" you would have to have it set to "Avoid Transpositions in RealTracks" in the song settings, but I'm not sure if that always works as it says "...will try not to transpose"

Maybe it should be a product that you buy separate if you use it as a teaching tool, maybe that's what they will do as they would of put a lot of work in it already.

Biab Track Injector for Reaper
Free Biab Chord Picker Tool