I have all the ZT's, and I use them. The ZT Battle Mistress is lighter than the combat grade version, but because the grind is a high saber grind on the ZT it remains very tough and it actually chops as well as the heavier knife, maybe better because the saber grind does not tend to stick as much as the full flat grind combat grade blades - on deep cuts and chops that is. Also, the zero edge grind (which is convex as far as I can tell) is much preferred by me over the old asymetrical grind on the combat grade e-series. Put it this way, the knife in my survival pack, which I always take with me when I fly around the Alaska bush, is a Steelheart ZT.