Oh, Seckerson.
I don't see the value in comparing this 2020 recording to one that's from 1948. Yes, they are wonderful to revisit, but too much has changed in 72 years. We're currently in the middle of an entirely different musical aesthetic, postmodernism (or some even say we're post-postmodernism), and the way conductors and performers approach and interpret music is so different today. Even the way people listen to music is completely different than it was in 1948. In the height of late modernism, it's no doubt that Wunderlich's emotional and expressionistic approach made a splash. I don't believe that RDS was even trying to sound like Wunderlich or Patzak. My point is that it's a totally different approach to music-making and it's not really fair to compare.
Instead of holding the recordings of the past on a pedestal, I just find it more productive to compare the recordings of today to each other, or ones from the recent past. How does Jurowski compare to the recent Fischers and Rattle? How does RDS compare in his recent two? How does Stuart Skelton compare in his recent two? How does Skelton compare to RDS? I don't think any conductors and performers today are thinking, "I hope we do as well as the Klemperer recording." My way of looking at it is: how does this recordings compare to the Das Lied von der Erde of today?
On the Iván Fischer recording, RDS sounds totally different than the Jurowski! I won't say it's more expressive, but it is more controlled (less wobbly) and there is less dominating vibrato. It just goes to show that performers are intent on making their contemporary artistic stamp and not to compete with performers from 72 years ago.