The Kap 7 balls are much more forgiving to under/over inflation, where the Mikasa balls react much different under or over their listed air pressure. Too much and it skips high and far, too little and it falls flat in front of the cage. I experimented with them last year and started to purposely over inflate them on some days and let a little air out on other days. But during a game, you never know what the balls psi is gonna be. They are great if the pressure is perfect, but that’s rarely the case.