There's a very slim line here between this and the 6770.
The 560, clocked at the same speed as the 460, will perform exactly the same --- correct? And according to the graphs and charts I have seen, it will have nearly the same power draw at the same clock. That tells me they are the same chips that went into the 460, just matured even more for higher clocks and the improved Nvidia memory controller (and that's not apart of the chip, is it?).
And this is considered a refresh --- which I agree, this is a refresh. But to call this a refresh and the 6770 a re-badge is really cutting it close, because I am sure AMD has similarly improved the manufacturer process of the 5770 chips over a year and a half's time.