selway,I have done the test with wood behind a piece of foam and the heavy arrow in most cases would explode the board where as the lighter one would just leave a small hole.Now if you lower the foc way down on the heavy arrow then the lighter arrow always won out.I have shot at different distances and that plays a role.12% foc always yielded better results untill I tried a traditional stinger and it performed best at 18% but that is most likely due to the amount of foc that is already built into the shaft.

Yes all Of my arrows diameters were the same.I used weight tubes and points that were identical.

It always came down to how I put the arrow together and not the overall weight.When all things were equall,the light arrows would win out on foam and the heavy would win out on wood.Carbon would win out over aluminum and so forth.