The Heaven 2.5 benchmark is a great indicator of raw graphical performance, and shows what the extra technical goodness of the GF 110 GPU offers over the vanilla card's GF 114 chip.
The Metro 2033 score is also a good indicator of DX11 performance, and also shows what the extra tessellation engines in the 14 streaming microprocessors offers the consumer.
These scores aren't far short of the GTX 570 and with the Asus card's impressive cooling the overclocking results can surpass it.
DirectX 11 tessellation performance
DirectX 11 gaming performance (2560x1600)
DirectX 11 gaming performance (1920x1080)
DirectX 10 gaming performance (1560x1600)