Again, slight differences in tip placement, stroke speed, and aim can explain what you are seeing.
I disagree. Any decent shooter following the procedures in my videos (using the golf tee and making sure the cue is over the rail diamond to help with tip position and aiming, observing CB motion, and taking lots of shots) can get repeatable and reliable comparisons among different tables. I certainly knew when shots were bad or not, especially with the banks. If I did not get a stop shot, I knew the aim or tip height was off slightly. And if the CB turned in place at all, I knew I had unintentional sidespin. If a player cannot get relatively consistent results, they probably should not be shooting kicks or banks in games. Did you see how consistent the shots were in the video? They weren’t all perfect, but the comparisons among the tables were certainly clear and reliable.