answer:Depends on the rules and who the people are. Also, Japanese martial arts are traditionally divided into art forms and fighting forms, designated by the final part of the name. -do is an art form, while -jutsu is a fighting form. Taekwondo doesn’t match that pattern, and is taught as practical, art, and sport. Judo is an art and sport form, which concentrates on throws and pins. It includes some strikes and kicks and weapon use, but those are more just the forms, and are not used in the sport matches. So I would tend to expect that an expert who only trained in Judo and/or was limited to using Judo training, would probably be at a disadvantage versus an otherwise-equal Taekrondo expert, unless it was a Judo match, or the rules of the match disallowed or de-emphasized strikes and kicks. Jujutsu however, was traditionally a more serious/practical form, designed for taking on armed opponents even when not using weapons, and included practical use of strikes, kicks and weapons. I would think an Jujutsu expert would be more likely to be well-matched against a Taekwondo expert, but again I would think it would come down to specifics of the individuals and the situation.