Im pretty sure Bruce Lee was moving on from martial arts with forms and such and basically going into MMA
Chuck Norris was a badass.
"On November 24, 1968, he avenged his defeat to Delgado and by doing so won the Professional Middleweight Karate champion title, which he held for six consecutive years.[8] In 1969, he won Karate's triple crown for the most tournament wins of the year, and the Fighter of the Year award by Black Belt Magazine. Chuck Norris retired with a karate record of 183102."