I downloaded a FLAC rip through bittorrent of the EU/US Candid CD to compare to my Japanese CD from 1986 and indeed all sorts of vinyl rip pops and clicks are audible, e.g. on Driva' Man. Apparently the Japanese Victor CD was made from Max Roach's personal master tapes.
The MFSL Hybrid SACD of Sketches of Spain is stunning. The CD from The Complete Columbia Album Collection was already better than the metal spine set. However, I was not impressed with the sound of Porgy and Bess in TCCAC.
I listened to Porgy and Bess yesterday, paying attention to both takes of Gone included, but what I came away with was a realisation of why I preferred Sketches of Spain all these years. Not what you were asking for, sorry.
I think it's been some 18 years since I last listened attentively to Miles' Porgy and Bess. Time to give the remastered CD from The Complete Columbia Album Collection a spin later today? It has the alternate Gone.
The image is photoshopped, though. That colour photo of tree and sky and hay(?) is nowhere to be found in the booklet. All black, white and purple text and photos.
It's better for listening. I started with the 2CD when the big box was released, much later bought the big box when it became a budget release in the EU. Then I bought the 4CD set you got, and the improved mastering by Vic Anesini from 2007 is another reason I am able to listen to this without distraction.