Can Jiu-Jitsu beat Taekwondo?
It is highly unlikely that a black belt in Taekwondo can beat a black belt in Brazilian Jiu-Jitsu. The former might be able to land a few punches or kicks, but he would likely end up quickly on the ground unconscious.
Can Jiu-Jitsu beat Karate? Athletes trained in BJJ have a better chance of beating the karateka in a street fight. It’s hard to imagine fighting backwards as BJJ is superior to Karate in most aspects. This may interest you : Is Kung Fu better than karate?. Both Karate and BJJ focus too much on competition and fighting under the rules.
What martial arts is better than Taekwondo?
Karate tends to focus more on solid stances, power and strength, while Taekwondo focuses on flexibility, speed and mobility. Karate also tends to give equal time to hand and foot techniques, while Taekwondo focuses entirely on kicks.