Kuzma 4 point--no contest
While the 4Point is a great arm and one that I've heard on the Firebird several times, the Acoustical Systems - The Axiom is what I personally run and have never heard better until a few minutes ago and at half the price I just mounted the new Aquilar on the smaller Woodpecker and find it pretty close. Of course these are $20k and $10.5k respectively so a bit more money.
Stringreen, not so much! Keep in mind in her recordings she was singing into a microphone, while with recording a violin the mics would likely be placed to create a stereo image.
We had a setup in our room that allowed her to sing into a microphone along with her music, which was the same mix but without the vocals.
She could also sing along with her LPs (with or without the microphone). So we could hear the results either way.