Sorry for the delay! Rondos, PIs, and Rondo Golds are to me very "pure" sounding strings. The Dynamos are very textured, you get a lot of grit to the sound, which I like. For the Rondo Gold, and Rondo, I hear this midrange "honk" that I find unpleasant under the ear. The Rondo Gold are definitely better in that regard than regular Rondo. For pure, powerful strings you can't be PI. For textured, powerful strings, there's a reason Dynamo strings are getting so much attention these days.