There is a lot of knowledge here about the SG stones from some very knowledgeable people. However, there seems to be contradictory opinions out there. Some say it's slightly softer than the Kuromakus. Some say it's softer than the Naniwa pros and on the softer side of SNG stones. I have even heard someone say it feels like rubber. What are its characteristics? Dishing, Hardness, Cutting?