Those 17s look like pretty high performance cats to me.
It will be interesting to see how many male drivers will medal.

From my own experience i would speculate that the N17 would be more fun to go off the wind in a breeze with some winglets or a T rudder. Controlled skimming. The skill it takes to balance that boat w/o winglets may just add to the competon, however.
Forecast for wind in Rio for the olympics?