I would like to say that with standard Hills or my single bevel Hill that I have seen a huge advantage with razor sharp versus file sharpened Hill style with my Grizzly files, but I have not. The old Grizzly file has rounded smooth narrow sides, which can be used like a steel. The filing curf ends with a very abrupt sharp edge, which can create a very keen and fine serration. With softer heads, I have noticed that at times the razor sharp edge can be very dull after going through a deer. While the filed edges seem to have more left after going through a deer. I have noticed this as well with using the flat narrow side of a standard file and pulling the edge up on Zwickeys. A Zwickey with this typed of edge has proved to be 100% effective for us on deer.