These are very intriguing strings. They are much warmer than the regular Rondo's and maybe a little more stiffer too. The graph on the back of their box shows the playability going towards demanding, which I kind of question. When I play on them they feel easy to play and I can get a smooth tone out of them without too much trouble. In regards to other strings these compare to, I would say these would be like Evah Golds, Maybe Dynamo's or very close to Dominant Pro's. I definitely wish they weren't so pricey though. I would give these 5 out of 5 stars for their sound but I have to stay at 4 out of 5 due top their high price.