Because the sail is fuller you can tighten the rig to depower the sailplan with out over flattening the main. Also the sail is a little fuller in the head which allows you to ease the main in puffs to keep the boat flat and not completely lose the top of the main. The SA-1 main is better for heavier crews or for softer masts like the Sidewinder Jr. and softer Proctor Miracles. The SA-1 was the sail used by the Team Paradeda to win the 2001 Winter Circuit and North Americans. The SA-1 started as a design from North Sails Argentina that was improved in our San Diego loft with the help of Brazilian Alexandre Paradeda.
Less weight means less pitching and more speed.
Lower stretch means a flatter, more easily controlled sail in a blow. The SA-1 features Pentex on the head and bottom of the sail that is a lower stretch cloth and that holds more load without distorsion. We have dramatically improved the performance of the BR-1 jib by changing the cloth in the body of the sail to a higher performance style. Until now the standard Dacron Snipe cloth has been a 2.6 oz. cloth. This improved strength to weight ratio of this cloth really improves the performance of the sail as the breeze builds from light to heavy.