The Leatherwood Rosin comes in Crisp or Supple. Today, I played them back to back to see if you could hear a difference!
A review of the one and only Leatherwood Bespoke Rosin from http://violinistablog.com/leatherwood-bespoke-rosin/
Strings Magazine, May 2018
Strad Magazine Accessories Supplement, June 2018
Archi Magazine (Italy), 2017