I like the Pyramid Monel Classics too. I've had a set on for over a month and still sweet. I think these have just a little more bite on the attack while not being too bright. They feel refined like the Nickel Classics with similar tension. They are also round core. I'll try a set on my R6 too. I'm using 11-48 unwound G. I got these through TM1 Don and will get more from him. He's good.