What is the difference between the fighting styles of Sambo and Brazilian Jiu Jitsu?

Brazil Gracie Jiu Jitsu is proficient in the ground. As for Russia's three treasures, it can't fold its arms behind its back, nor can it press or twist its head. But the three treasures are also very powerful, and the rules are different just to meet different needs!

Personally, I think every martial art has its own advantages and disadvantages! There are all kinds of martial arts in the world!