Performance will be about the same, I believe.
AAC also has a new generation of cans coming out soon, the SR-5 (5.56) and SR-7 (.30 bore) with a new generation of mounts to go with it. AAC has pulled them off the website, though, so that doesn't bode well for release window - which was originally supposed to be a year ago.
Never argue with an idiot. They will drag you down to their level and beat you with experience.