Misha,
I see your point but I don't entirely agree. If I am working on a solo track with a prominent part then def work on it as you describe, carefully generating each section or even each bar to get what I want. On the other hand, if I am working on a bass track or drum track I rarely use partial regen on those tracks because what BIAB gives me is just fine (with the rare exception of a sour note or bad bar.) So, on a solo track I might want an exact duplicate copy but on a track I don't plan to do any handcrafting regens on I'd prefer the content be different.

However, as I have just written the above paragraph, I think I have decided I agree with you in all cases to just keep it simpler for PGM. If they do an EXACT duplicate of the content and I just press PLAY I will instantly get a different version of the duped track (assuming BIAB follows its rule about 2 tracks each using the same RealTrack.) And, if for some reason I wish to keep the duped EXACT copy I can just freeze it.

So YES, I agree. It must be an EXACT duplicate including content! Thanks for talking me down into simpler territory!