The Previn recording was excellent and detailed, it can be balanced carefully in the studio. However, the problems live seemed to me to be a combo of the conductor being in an unfamiliar hall and not taking much trouble to establish the acustics and the seeming need to highlight the orchestra and tell the singers to produce all possible sound. One trumpet can blot out a large chorus.
The Previn I have is live, on DG from 1994, the WP with the Arnold Schoenberg Chor. I didn't realize he had recorded this twice. Yes, as M said it is pretty good, an exciting performance, but I had a few quibbles I remember, sometimes the sound is a bit harsh and the inner parts aren't always clear.
This disc has a funny story attached, I bought it because we were playing a transcription in band, I was 14, and it was the first DG disc I ever bought. I knew "The Yellow Label" was quite prestigious in classical and it was the most expensive one, so I figured it must be the "best"!

I'm seeing this live next year and want to get another, one with more clarity. I will definitely look into the Jochum.