I’ve bought both sets and compared several of the remasterings to the Wilma Cozart supervised masterings and , at least on my set, there is a notable difference in detail and soundstaging. The incredible depth of field is just not present on the new set.
That, along with the closeup detail, was what set Mercury apart from the herd. The Thomas Fine set sounds fine in and of itself, but not much different from other label’s releases from the period, and indeed of many current high quality releases.
But it is not the “Mercury sound” that is so unique.
I understand that through the years it has been criticized for being bright and edgy, but with new, more sophisticated equipment, that very quality was transformed into a higher resolution presentation.
The Golden Imports CD releases got it right. Comparing them to the original LP’s, there is little loss of quality.
I’d be very interested on what other board you saw a discussion of this topic.