I'm way behind both of you, both wind and wing, and also balance challenged.
But everyone raves about breach control with wing over sail, and speed appears similar with same size foils.
Porpoising is my main challenge, mostly winds from 7-20 on the same run at the same spot, while windfoiling. About 4.2 sail.
The best guys wingfoiling here at Berkeley, mostly 150-175 lbs., all use hi aspect foils from 800 to 1000 sq cm, mostly 4 meter wings in 22 knot gusts, even with lulls under 10 knots.
I almost can't stay on windfoil in the lulls, and 22 knot winds, for me, requires a 3.9 sail.
So the wing journey continues, starting at the 2nd od 10 steps.....