Haven't skied behind either, though I now have latest PP w/StarGazer on my boat in Winter storage. Some live drivers are really easy to ski behind and some not . . they anticipate the skier, not react to the skier. I asked a lot of questions but never learned if these speed control systems are in sync with the skier maintaining a near constant speed, or if there is latency causing noticeable acceleration as you approach the wake. I have only talked to one skiing friend with a ZO boat and he says you need to practice behind a ZO boat to ski in tournaments. On this forum others have said the 2 systems are similar enough - if the PP is a recent software version.
So the questions are about latency and boat speed fluctuation as the speed control reacts to the skier. Does the boat stay in a +/- 1 mph speed, or is it +/- 1/2 mph ? or what do you think ? (for example with a 180 pound skier 35off/34)