Alfred, Why don't you email your post to Kimber and see what they suggest. They have a fast reply time and have always given me good advise!
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They both use silver to carry the signal so I don't think one is brighter than the other. I tried them both and they are very similar. A little better resolution from the 1030 but the tonal balance is the same. I bought half meter 1030 for my front end and 1020 for a long run from preamp to amp because I just could not afford the $4000 difference in price on a long cable.