I wondered about that too. If I compare the angle of the bottom edge in profile it appears to be the same, so the lower back mandible being lower doesn't make sense. I think it must have to do with the camera angles/distance etc. I know for a fact that my camera angle isn't exact to the other one. You can tell when you look at the way the T part of the visor curves back around on the same side of the helmet. Just doesn't quite match up. Oh, well. I tried. But thanks for pointing that out. It also may be that my lid is slightly different in shape on top of the angle being different. I'm prepared to accept that as a possibility. I'm also prepared to leave it as it is LOL.