I briefly owned a German version of the Kalishnikov bayonet. It actually had a diode in the scabbard that illuminated if you were cutting a live wire. I gratefully sold it to a collector! Increased weight usually indicates attempts at increasing strength. This can be good or bad. If a two lb. version fails at the same point as the 1lb, then there has been a degradation in metallurgy. Overall gear load is a consideration, be you Airforce loadmaster or hoisting a backpack.The best knive is always the one you just bought, and the one in the latest catalog