Nothing major here, but I have a brand new set of Pyramid Nickel Classics strings (10-46) that someone can have. I love the Pyramid Max Performance strings and thought I was getting the same thing when I got three sets of these. I used the first two, but have found that they're just not the same to me ears (and hands). They just sound more dull and muted to me. If anyone's been wanting to try these and likes more warmth than brightness in your strings, feel free to contact me.