I guess you would have to compare the DF LE since the new SRKW M9 is an LE.Sounds interesting.From the knowledge I've been able to glean from this forum SR-77 is much more corrosion resistant than SR-101 but doesn't hold as good of an edge.That being said The only moderate sized Dog I have is the Yard Hook and it's been beat to heck and back and will still slice paper,so I've really never noticed a difference in edge holding between either steel.I do like Res-c as a handle material (especially on a chopper) though.