I have the Cardas that I am not using and a Benchmark RCA to XLR cable (reverse also available) from my Benchmark DAC3B to my RAAL VM-1a headphone amp. It sounds the same as my Audience AU24 SE XLR to XLR from the same DAC3B to my VM-1a amp. A pleasant surprise since the Benchmark cable cost very little.
The Cardas sounds OK too, but I feel that there are more connection points using the Cardas. While the Benchmark is just a single cable.