The throw defines Judo, the ground defines BJJ. Judo athletes practice explosive grips and breakfalls, chasing the ippon. BJJ students spend extended sessions on mat-based problem-solving, drilling escapes and submissions. That divide influences how each art works in real conflict. https://gutocamposbjj.com/blog/difference-between-judo-and-jiu-jitsu-which-one-should-you-train/