It's a faster sail when uni. Responds so much nicer to the lighter loads. I really, really like it.
That is pretty much it for F16's; One can use the sloop sail for some decent (recreational) uni sailing but the whole package becomes just right (as in uni-racing) when a specialized uni-sail is bought together with the sloop rigged boat. All the other hardware is fully interchangeable between both uses.
I'm saving up for my specialized uni sail !
Wouter
