After two rounds and hours on the practice greens n bunkers, I'm done. The square was my winner hands down. Felt a little firmer than the circle but responded in every way I needed. The stopping ability on chips was one of the most impressive qualities. I had good mid irons with the circle but it never really wowed me. If the circle was a pro v or a nxt I would be surprised and feel like I have bad judgement. Anybody else feel the circle was a total experiment ball and the square is the next pro v1x? Another opportunity to say thank you to Titleist! Such a fun experience.