I'm fairly confident that the same arrow/broadhead setup was used for both the Drenalin and the X-Force. Otherwise, why try to prove anything in a test? While shaft and tip selection are extremely important, it appears as if Mathews has fallen short from an arrow velocity perspective, with the Drenalin, thus creating less kinetic energy. But then again, Bowtech, Hoyt, and others may also be hard pressed to compete with the PSE, unless you're shooting a Black Knight or Pro-40. I'm personally sticking with Bowtech. I've owned 7-8 different Bowtech's, and have never had any issues, with any of them. Having said that, the PSE is sure intrigueing!
Cheers,
Weatherby