Since we can not compare the polars due to windshifts as seen in this topic: viewtopic.php?t=2395866&p=972067
Maybe it is better to compare the average VMG, Speed and angle over 500m including a tack upwind and a gybe downwind with equal amounts before and after the tack/gybe to filter out most of the windshift-errors and get a better idea of you and your gears performance.
You can find the option in GPS action replay here:
Here are my best up and downwind i could find:
Kite: Peter Lynn Aero UL 11m
Lines: 14m
Foil: Levitaz bionic 110cm with Aspect HW frontwing
Wind: 16kn avg, gusting 21kn