Unlike digitizing an analog master tape, there's nothing really to be gained from the SACD format on this one given that it's just a CD-quality digital master.
It depends on the converters and conversion software that Kevin Gray is using. The quality of newer DSD (and PCM) converters and conversion software today is much better than what was used in the past.
Which helps to explain why remastered albums can sound so much better than the original releases - regardless of whether the original source was Analog or PCM.