Battlefield: Bad Company 2
BC2 uses DirectX 11, but according to this interview, DX11 is mainly used to speed up soft shadow filtering. The DirectX 10 rendering path produces the same images.
We turned up nearly all of the image quality settings in the game. Our test sessions took place in the first 60 seconds of the "Heart of Darkness" level.
This one is more or less a dead heat, although WICKED outduels AUSUM in more pronounced fashion.