In my experience with silver cables, generically one could expect a little extra detail (and perhaps tizzyness) while sacrificing some warmth and fullness.
Generically, one could also expect slightly less detail but more warmth and fullness and naturalness with a copper cable.
But as with most things, it ultimately, it comes down to the attention given and execution of the design by the mfg'er. And once this special attention has been given to either cable, all bets are off.
It would seem however that it is more common to see the extra detail designed into a copper cable than it is to see added warmth and fullness designed into a silver cable.
But again, when a truly smart cookie is designing the cable, it should matter less what material is used.
-IMO
Generically, one could also expect slightly less detail but more warmth and fullness and naturalness with a copper cable.
But as with most things, it ultimately, it comes down to the attention given and execution of the design by the mfg'er. And once this special attention has been given to either cable, all bets are off.
It would seem however that it is more common to see the extra detail designed into a copper cable than it is to see added warmth and fullness designed into a silver cable.
But again, when a truly smart cookie is designing the cable, it should matter less what material is used.
-IMO