The key difference is that Dutch kickboxing allows fighters to kick both above and below the waist, while American kickboxing only allows kicking above the waist, so no low kicks are allowed. As such, the Dutch style allows more ways to attack their opponent than the American style.
Badr Hari is not the greatest kickboxer of all time, as he certainly wasn’t the most dominant one who never won the K-1 World Grand Prix title. But Hari became the most popular kickboxer due to his exciting fighting style, charismatic persona, wild behavior, and constant media attention.
Karate has 8 colored belts for adults: white, yellow, orange, green, blue, purple, brown, and black. In contrast, Taekwondo has 10 belt ranks (World TKD standard): white, yellow, orange, green, purple, blue, brown, red, Jr. black, and black.
Netherlands was the first country to adopt modern kickboxing from Japan. It quickly established global dominance and became home to the best training facilities, coaches, and world champions, all of whom played very influential roles in making it a very popular sport in the Netherlands.
Kickboxing is one of the most popular combat sports that has been around since the 1950s. Though kickboxing is often associated with countries with strong martial arts cultures, such as Japan or Thailand, the nation that actually dominates the sport is the Netherlands.
Taekwondo has a bad reputation because it focuses too much on kicking skills, making it a one-dimensional art, and also because of its emphasis on rules and competition over self-defense. As a result, taekwondo has lost its reputation as a combat art and is now primarily perceived as a sport.