I was reading an interview done with Ricardo De La Riva and he said that there hasn't probably hasn't been a Helio Gracie student that has ever beaten a Carlson Gracie student. This interested me to research and I haven't found anybody. I know Carlson students and Helio Students always had a rivalry.

Notable Carlson students:
Murilo Bustamente
Ricardo De La Riva
Mario Sperry
Wallid Ismail
Mauricio Rua
Vitor Belfort

Helio students:
Royce Gracie
Renzo Gracie
Rickson Gracie
Royler Gracie

Was this a true statement?
What does MMA have to do with BJJ in the sense of a BJJ tournament? The answer doesn't even anything to do with my question.