Difference in sound between copper and silver digital cables?

I've been trying different digital cables over the past three months.A couple of them were OCC silver which to me sounds too soft and smooth as opposed to Kimber which was edgy and harsh.Furutech (copper) was decent but somewhat smeared the music.I've got an Audio Envy on the way.I do like their ics.
Right now I'm using a Silnote Morpheus lll ($495)and it may be the winner.They do have a couple that are lower cost of you want to check them out.These are gold/silver/copper.There is no smearing and and a very good blend of warmth and detail.I have no idea if it's just the connectors that make the difference,but they do all sound different to me.
Something I liked quite a bit was an old Gabriel Gold ic cable which is also gold/silver/copper.It smeared the music a little and seemed more dynamic with a bit of edge and grit,but I like rock and blues so it made for some colorful enhancement.The Silnote is more refined.In the next few days I'll compare to the AE and see what happens.My two cents,hope it helps some:-)

Some companies actually do measure the cables and the info and graphs are on the websites.What I have found is it doesn't matter how the cables measure if the components(most of them) are unable to send and recover a perfect signal.Trial and error with different cables until you find the one by'happy accident' that seems to counteract the errors and allow your system to sing.The perfect cable could be one buried in your junk box,an expensive boutique,or anything in between.