Well silver is a slightly better conductor of electricity - but I've got no doubt that the majority of people would not hear any difference when compared to the stock cable.
If you turn out to one of the ones that perceive a difference, it would be interesting to carry out an experiment:
Get someone to swap the cables without you knowing. If you can consistently tell which cable you're listening to (and you prefer the silver).....then it will have made sense.
But only you can be the judge.