There has been some mention of heavy weather, on the nose, later in the week.
But then the F18's have smaller rigs and similar righting moment. What would you choose.
F16!
Time will tell but the I've always heard the 20 is a better open water boat. Longer, fuller bows and all that.
With all respect to the guys sailing the 20s (I wouldn't even attempt this race), the 18s have more talent on the water.
The only thing I'm certain of: catamaran sailing is marketable.