K2's factory lineup comes with the schizo baseplate I believe, so they suggest that you mate these skis and bindings. They are owned under the same parent company, so they are marketing it as a package. But you can absolutely mount schizos on other brands. How could marker market them if not?
And the mounting pattern is probably about the same width, but longer, because the baseplate has to be 6 cm longer than your bootsole length.