Since you seem to know a lot about the audio, do you perhaps know if there is a list of this kind for Empire? I liked the standard audio on the MKV a lot, but I wonder what the alternate versions were.
The audio options narrow as the trilogy progresses. For Empire, 1980 stereo audio (and upmixed 6-channel surround) is the way to go. 93 audio is more or less the same (identical dialogue), very good quality, but it’s missing a sound effect for the snowspeeder crash which can only really be considered an error. There was also a very different 1980 70mm audio mix which we don’t have in any usable quality, and it went with a different cut of the video anyway so it wouldn’t really be right with the 35mm cut of the video. The 1980 mono mix was a relatively recent discovery, at least to me, and it features some alternate C-3PO lines which are interesting. But really, 1980 stereo or upmix is the winner.
For Jedi, there’s 83 stereo and upmixed 6-channel, and 93 stereo. They are all dialogue-identical, but 93 is definitely a different (and widely considered good) mix. We don’t know for certain if the 70mm mix had any unique dialogue or effects, or if there was even a mono mix at all, but I think the consensus is there wasn’t. So for Jedi, 83 or 93 are both fine, and there’s no difference in dialogue between them.