MFSL Ultradisc vs. Ultradisc II

I'm not positive, but I *think* there was only one MFSL Dark Side issue on CD. The one I own is on a gold CD. They may be referring to the gold CDs as "Ultradisc II" and the older, silver MFSL CDs as Ultradisc 1. If that's true and there is an option...go with the newer, gold CD. The newer mastering process should sound better. In the later years, MFSL introduced an even newer mastering system called the "Gain 2" system, but I don't think there was a version of Dark Side issued using that process.

And one more thing to consider...

Yeah...the MFSL DSOTM mastering may have been superior at the time (late 80s? very early 90s?), but mastering technology has improved a great deal since then. I'm not saying that a current remastering is necessarily going to sound better, but it *should* sound better due to technological advances (of course there is always the mastering engineer to consider, and no amount of modern equipment will make a bad engineer's work sound good).