Company of Heroes
Image Quality Settings - 0xAA 0xAF

At our base IQ setting, Company of Heroes ranks the hardware and you'd expect, considering the overall capabilities of the hardware configurations taking part and SLI working with the game. GeForce 7900 GTX musters up about 80% of Radeon X1950 XTX's performance, GeForce 7950 GX2 adds little with its SLI configuration but it is working to some extent, and the G80-based boards sit at the top. The gap between GTX and GTS hints that on G80, CoH is bound by shader processing more than anything else.
Image Quality Settings - 0xAA 16xAF

Adding a high level of AF decreases performance on all hardware by around 2-10%, depending on the product. Radeon X1950 XTX and GeForce 7900 GTX take the smallest hit, the G80 boards suffering more appreciably at all resolution steps.
General Conclusions
At the higher resolutions, NVIDIA's fastest single-chip hardware is almost 2x the performance of AMD's current single-chip graphics product, as we await their next generation showing up. Further, GeForce 8800 GTS almost justifies its price premium compared to Radeon X1950 XTX in this game.