[Itaxpica]

“Systema” is Russian aikido dressed up in a bunch of mysticism about how it’s ~so deadly~; there’s no meaningful distinction between the two. Krav is some useful principles crippled by the lack of sparring in most (but by no means all) schools. I’ve trained both Krav and BJJ (and traditional karate), and the only one of the three that I think would be actually useful in a fight is BJJ because I actually DO use it in combat situations as part of regular training. Fighting someone is a physical task just like any other, and like any other physical task the more practice you have doing it the better at it you’ll be, no matter how good the theoretical aspects of a different art that doesn’t get that practice are.