Why would you compare those two numbers? AM don't even produce consumer hardware.
If I recall correctly, at chip level AM Gen3 sim result was announced to be 0.35W/GH and actual performance was tested at 0.70W/GH (at the same clock speed).

Anyway, Guy is often making snide remarks about AM and the under spec. performance of Gen3, so hopefully the rockerbox won't underperform by that margin or he'll look a bit silly.