Corporate Thug
Lifer
Gotta understand where console technology comes from. These design specs were probably finalized about 3 or 4 years ago, meaning the 6670 was better technology than was even available to the market at the time.
Also keep in mind that consoles have to fit into tighter power and thermal profiles than desktop PC's that can devote huge amounts of space to exotic cooling solutions can.
Even if the bolded is true, I would imagine that the higher end 4XXX > 6770