<< 1) Is the result of this technique similar to what I would get if I put the same RealTrack on multiple tracks? >>

The end result you hear is the same as RealTracks on multiple tracks. It's a mix with panning and volume level control of each track. The result is similar to what you hear from an Aux send on an analog mixer or monitoring a bus mix in a DAW.

<< 2) Does BIAB successfully manage this to avoid the same riff from being played on multiple medley tracks at the same time? I noticed when I put the same RealTrack on two different tracks and pan them left and right, BIAB usually uses a different riff on each track but occasionally it messes up and plays the identical riff at the same time which causes the panning to disappear and the volume of the tracks to increase for that period of time. The reason I'm curious is the thickening feature allows up to 10 medley tracks to be used and I would be surprised if there are enough unique riffs to ensure no duplication. >>

It's likely there will be the occasional duplicate riffs using that many instrument tracks because each track is pulling from a set amount of pre recorded material.

<< 3) Once you do this is there any way to separate back out the individual parts of the medley? I could see me wanting to export them as separate audio files for my DAW mix.>>

The intention is designed to complete this task solely within BIAB and if the track is exported, the default is to be the mix of all the instruments as programmed. But yes, there's a workaround.

In the newer versions that have the panning and volume level adjustment included. Setting a track's volume to -64 results in that track being muted. If you had a medley, to separate each individual instrument, freeze the track, set the db on each track but the first to -64 so only the first track will be heard, play and export that track. Then, select the track and open RealTrack Picker, select the Medley, reduce the volume of the first track to -64, set the volume of the second track to 0, play and export, and keep repeating this process for each individual instrument you want to separate and export to a DAW. I just tried it with a couple of instruments and it worked.

Just note that the panning and volume feature has only been included in the Medley for the past few years. 2019 or newer I believe.

BIAB Ultra Pak+ 2024:RB 2024, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.