I honestly haven't done a side by side chopoff with the FSH - I dig the knife mostly because it's Bama Clay, and simply haven't used it all that much. I'm going to have to reshape the machined handles on the FSH before it sees much more use.
The next largest INFI knife I have is the NMSFNO, and not surprisingly, the zilla outchopped it, although they both had factory edges at the time, and both have been given proper sharp edges since.