The difference between the materials is easy to generalize however the material does not have as big an impact as the entir package. The sound you get will depend on gauge the braid if it is braided the sheilding, the source cable quality etc. otherwise I would recommend copper but most are mediocre. Silver is expensive band not particularily the best choice for a slamming SS amp. Save your money and get Cardas Golden (fill in the blank it changes often) perfections. They are euphonic and as warm as a nice fire on a winter day.