That’s interesting…I guess better mastering could be a factor or perhaps better DA converting for red book. Are the SACD’s DSD? I find SACD that are still based on pcm mastering inferior to dsd mastering:

“DSD uses delta-sigma modulation a form of pulse-density modulation encoding, a technique to represent audio signals in digital format, a sequence of single-bit values at a sampling rate of 2.8224 MHz. This is 64 times the CD audio sampling rate of 44.1 kHz, but with 1-bit samples instead of 16-bit samples.”

…that’s a big difference…

I thoroughly enjoy Karl Bohm’s version of Mozart clarinet concert on SACD : it is SO fluid and blooming, so f€&@%n mellifluous. Also Ali Akbar Khan’s Indian architexture on water lily records SACD. Got most of Coltrane on UHHQCD MQA: sounds so much more real and emotive: best version up until now: almost analog. Same relaxed sound as SACD. After this you can’t listen to those horrible pcm’s anymore.