Not to kick a hornets nest...but looking through the AMG, Razor, my Cronus, SBII, and the kahles I really cant tell a difference at all. I don’t think there is any argument in quality or toughness of a SB. I think it has more to do with bang for the buck. But with those links you posted earlier I would get an SB over a Razor or AMG. If it were off europtics or from a retailer I would default to a vortex Razor/AMG and try and save the $1k I’ve seen personally in the retail price difference.