Shiseido Curious Cassis (RD620) is a warm burgundy with a satin finish that is discontinued and retails for $28.00. In comparison, Make Up For Ever Mighty Maroon (420) is a warm burgundy with a satin finish that is permanent and retails for $23.00.
Make Up For Ever Mighty Maroon (420) is 85% similar — it is darker, cooler.