That's so neat. Wish I could understand it.
But overall, my belief is that an art's brutality isn't defined by punches or kicks, most arts have those, however more or less they apply them. But rather by the art's intent or willingness to maim, dislocate joints, or otherwise cause excessive pain, or turn an opponent's weapon against them.
However it's not the art though is it? It's the person who is willing to maim, cause pain etc. All the arts have the techniques you can use to do these but it's the willingness of the person to use them.