Judo is about the stand up fight; BJJ is about the ground fight. Judo classes emphasize throws and quick pins, ending matches in seconds. BJJ teaches you to survive bad positions and slowly progress to a submission. Both are effective, but they win in very different ways. https://gutocamposbjj.com/blog/difference-between-judo-and-jiu-jitsu-which-one-should-you-train/