ok i got it, the hobie uni graph looks a little guestimated and shows just 1 wind speed of 10mph, hobie 20 max boat speed of 14mph on a broad reach

the multi23 speed chart looks to have been much more closely plotted shows boat speeds on all angles with 7! different wind speeds. for comparisons sake the green line is 10knots and shows a boat speed of 12knots......

so it's slower than a hobie 20 on all points of sail???