The I20 is Mark Smith who has been working with some new sail cuts for the 20. To say his sail has a big head is an understatment. I wanna say it is like 5 feet or so. He did sail as nonclass sails from my understanding. Had the most "intresting" spin i have seen in a long time.
As for the Rice Viper sail I am not sure if it was bigger (never remebered to ask) or if the cut was just different giving it a different look. Really was a cool looking sail.

J