ORIGINAL: HNIJustin
Not just that, but look at the surface area of the two heads. The fixed blade appears to be some huge cut on contact head like a Steelforce or something. The Grim Reaper has much thinner blades with much less surface area, and therefore less drag.
Not saying the test is TOTALLY inaccurate, but there's a lot more to it than meets the eye.
Justin I think you hit the nail on he head!! Thin blades, what are % ones of those breaks when it hits rib bone or shoulder?