@Stevie Boy I only have a few sets on a 21 but have been on a vapor for 18,19 and 20. The difference between the 20 and 21 is not massive I would say a 10% difference. The difference is small but possibly significant. We as humans don't perceive speed well. It is either feeling acceleration or deceleration or the other way people judge speed is with landmarks. For us slalom skiers it is the bouys how much space do I have.... So to answer your question I feel that the ski takes a little more angle out of the bouy resulting in an earlier line into the next. This is accomplished by the clean water tail. I would actually say that I get more feel from the ski than last year. My first impression on the ski was wow I don't need to feel the boat as much because this thing feels stable under my feet.