For the Karajan set, I'm wondering if the new set on CD is the same as the CD layer on the DG hybrid SACD set remastered in 2003. Insights?
typically tapes will be mastered to 96/24 or 88/24; then the SACD's or CD's will be mastered from that. rarely a tape will be mastered to dsd directly. mostly DG discloses their mastering process on their CD's and SACD's......you will see this process there.
so go get the high rez file from HD tracks and that will be closest to the tapes.
i do lots of comparing PCM high rez PCM files to dsd files and it's very easy to hear how the PCM high rez is better than the dsd every time, unless specifically it was dsd mastered from tape. and for years i was a dsd champion. but improvements in dac chips and designs have raised the PCM performance and changed that equation.