Tom,
Here are the specs (as we know them) for comparison:
ASH-2 vs NMSFNO
Thickness = 0.22 vs 0.25
Height = 1.75 vs 1.875
Length = 9 vs 8
Grind = Saber vs FFG
The NMSFNO also has the nuclear treatment which removes metal and lightens the knife. I can't see the 0.03" thickness and 0.125 height making up for the extra 1" of blade and saber grind (more weight in the spine).
Do you have the weight of each, because if I can get an extra 1" of blade for less weight (while not sacrificing much thickness) I'll probably order one.