The ratings are based on reported racing. Since few SX's are or were raced the number is based on less experiences/races. The TheMightyHobie18 which has been raced extensively has the more accurate number. The more results you can compare will make the most fair rating. The SX was never proven to be substantially faster than the standard TheMightyHobie18.
How can a boat with less sail area and no spin be faster than the boat with more sail area and a spin. Makes no sense to me.
