The problem lies with the Bretonian GB which is ridiculously large, regardless of whether God himself made it or not. The problem also lies with the BD cruiser needing a tad more maneuverability and a tad more damage from the forward gun.
I flew the old OC Destroyer against Mjolnir and lost due to me just being plain terrible, since I was intoxicated and I just felt like charging. It worked fine. I have no idea about the new one, but I will try it out.