The phonetic differences between the digitally recorded Brahms Concerto (1981) and the still analogue recorded Beethoven's Triple Concerto (1979) is audible, but not violently; The Brahms Concerto has expected, the higher tonal clarity. The violin is relatively cautious, but overall quite clean shot with beautiful, spring-like timbre and tonal balance between the orchestra and solo instrument is ok. The orchestral sound is Karajan typical complacent: colored-soft with beautiful silky strings.
In Triple the string tutti mE have fallen into their powerful sonority to domininant in some places a bit - they threaten there then downright acoustic soloists. The piano is my other hand sound technology a little too much into the background.
Conclusion: For the Brahms Concerto 3.5 stars, for Beethoven 4 - makes benevolent 4 stars. Overall, more of a CD for fans of the violinist as for Brahms fans.