I find all the different audio tracks a bit confusing, to be honest. Not complaining about having them, just want to know what the differences are so that I can figure out which to use. Using the v2.0 MKV as a reference here:

There is three 1977 tracks, the difference seems to be the number of channels. Is there a difference between these three? I could understand why there could be a 5.1 and 2.0, but what is the mono track for? Is it different somehow?

What is the difference between the 1977 and 1993 tracks?

Why is does one of the "isolated score" tracks have a bunch of the sound effects and dialog, but only some of it, and the other doesn't?

I guess ultimately it boils down to, should I be listening to the 1977 or 1993 tracks?