Hi Agrelon, here is a test of the FU93 with North Warp 5.8: http://www.star-board.com/forum/showthread.php?t=5455
(I know you read French). It says this is a good combo but the board works even better with bigger sails up to 7 mē. Warp/RAM F8 are both very fast. The big advantage I see in cambered sails is lower drag, which makes them point a bit higher, go a bit faster... However the difference with no cam sails may be less sensible in small sizes.