Hi Janne the 190 is the latest version for PWA Foil Slalom courses, no upwind. The 180 was developed at the time when foil racing was meant to happen in both up and downwind racing as well as ltd slalom courses. That board is anyway almost sold out I believe, easier for lighter riders as it's not as wide as the 200 - which is built for bigger sails/up and downwind foiling mainly, for IFCA/PWA racing
Yes it's a bit confusing (the 180 will not be continued), but unfortunately the National Racing classes are not ready to join the PWA yet in the Foil Slalom discipline. Which is understandable as this still needs a bit of time to be accepted, especially as the test season of 2020 has basically been completely cancelled.
Where do you want to race with it?