I was waiting for someone to say something about the heavier arrow having more KE, but both are withing a couple of 10ths of a foot pound. With todays short furrel high quality broadheads the faster arrow will be just as accurate as long as the shooter can do his part. Yes you may gain just a tad more noise and vibration but thats why they make high quality stabilizers and limb savers, string leaches etc. So in the end you have a set up that is shooting flatter, faster and farther and delivering the same amount of energy. Whats not to like about that?