Judo is a close contact sport being a highly developed safe form of wrestling, it is a modern sport derived from the martial art of Jujitsu. Judo players (Judoka) wear strong loose fitting judo suits (Gi’s). They grapple and try to throw their opponents to the floor. Once on the floor the contest can continue with opponents trying to hold each other down to win the contest.
Karate is a system of unarmed combat using feet, hands and elbows as weapons, karate could be considered vaguely similar to boxing. The players wear much lighter weight suits and use punches, blocks, kicks and (dependant on the form) some throw’s to win a contest.