I can only agree. I had that combination for quite a while and was very satisfied with the experience. There was a feeling of having arrived. Until I drank too much dCS community cool aid and fell for an upgrade. 
The step from Bartók + Vivaldi clock with excellent clock cable to Vivaldi stack with average clock + AES cables was somewhat disappointing. It was very noticeable. But the improvement was not near what I expected from reading the unanimously positive reports on Vivaldi in the community. That kind of tells me the Bartók and Vivaldi clock combination can’t be that bad. Now with excellent digital cables the Vivaldi stack is way ahead. Just to say, the pecking order can also depend on the ancillary systems - cables, resonance control, power. This would also explain the different experiences in the other thread regarding sound quality difference between Rossini and Vivaldi. I know I am making generalized statements and they don’t hold true for all dimensions of sound and music presentation. Just a general yardstick…