Though both arts trace back to Japanese jujutsu, Judo and BJJ emphasize opposite arenas. Judo is about the throw land it clean, and the match is over. BJJ is about the ground survive, advance, and submit until your opponent has no options left. Each prepares you for different risks in combat. https://gutocamposbjj.com/blog/difference-between-judo-and-jiu-jitsu-which-one-should-you-train/