I've tried both. It's terribly hard for me to locate a palm ball. Now, the circle change was a completely different story. I also think it's not supposed to move a whole lot. That's why you have a curveball, or slider, or whatever. A changeup is supposed to mimic your fastball as closely as possible to get the hitters way out front and off balance, and then just a drop to keep the barrel off the ball. Thats my goal every time I throw a changeup. Make them hit weak groundballs/pop ups, or swing and miss.