In these rules throws are not allowed so it isolates the sparring
in Judo strikes are not allowed so you tie up safely and start fighting for throws
Vale Tudo,where there are no rules, would allow you to clinch and throw, or in Judo you would be allowed to strike on the way in
The point of K1 was to allow kyukushin to fight true full contact by adding boxing gloves and allowing head punches and KOs - it's all about evolution
"Jujutsu kumite" tried to link karate and Judo in the mid 90s but didn't really work, and that was largely down to too many rules
