Silver is absolutely better for audio signals and sounds clearer, more open, better low end and much more 3D positioning .
I have done many A/B comparisons over the years and am completely convinced of this.
The people that say otherwise are either deaf or too broke to get silver cabling .
Occam's razor says that the differences the OP are hearing exist only in his (or her) head.
So true...its amazing how EASILY people can hear all sorts of differences between cables, etc...like day and night UNTIL they get tested and then suddenly is like their ears stop working. Such hyper active imaginations....