MMA is exactly what it says, Mixed! In MMA you have fighters who have studied several different styles taking the best from each style. Such as taking the punching from boxing and the kicks from taekwandoo. In Brazilian Jiu Jitsu (which I am studying at the moment) is mainly grappling and ground work. When I say ground work I'm talking about the arm bars, the chocks, and the sweeps. Also, there's also some take downs. Brazilian Jiu Jitsu is not a striking style. Striking can be incorporated into the style though.