Just tried them out today, played front nine with the circle and the back with the square or diamond.

My opinion, the square matched my game better. It was longer off the driver and longer irons, but enough spin to stop with the short irons and wedges. Did not feel hard and great feeling of the putter.

I am an average golfer and played only one round with them 9 holes each. Will play again tomorrow and thursday to get a better feel for them.

Happy playing.