I have tested both heads. I like the shockwaves better as they are a bit more durable. penetration in flesh is going to be about the same with either head and both are accurate and sharp. Considering your KE levels a fixed blade head may be better, but if you really want to shoot a mechanical try the Rocky snyper or rocket steelhead. Both of these heads will give you better penetration and still give the accuracy you get from a mechancial. The snypers have the rearward opening blades like the revolutions if that is important to you as well.