Both pairs of grips are made by Pat Grashorn.
As to the Bisley, I read a lot about how great the Bisley was so made up several, or bought them, to compare grips with the Blackhawk and Super Blackhawk grips profiles. After thorough testing with various barrel lengths and bullet weights and calibers, I settled on the Super Blackhawk for my heavy recoiling stuff, and the Blackhawk for midrange stuff. Bisley proved my least favorite for fast recovery one hand shooting, and Super for hunting type loads. When chooting one handed, duelist style, the Bisley always pointed low for me.
Bob Wright