As has been stated, It's all in the ear of the beholder. More important than the actual metallurgy is the geometry of the conductors as well as the dielectric materials and their interaction. LCR parameters are affected more by the cable design than the conductor material itself. The difference in conductivity of silver over copper is relatively small and if the silver is alloyed with something else, then the difference is even smaller. I personally have a strong preference for copper over silver, but that's just me.
