#47, it still doesn't make sense. You can't say that two cards get more or less the same framerates, and then follow that up with "but at different resolutions". That's a completely useless statement.
From that page: The GeForce 6800Ultra performed best at 1024x768 4XAA/4XAF with performance only dropping below 30fps once. To achieve close to the same performance as the X800Pro the 6800Ultra has to be run at one resolution lower than the X800Pro, 1024x768 versus 1280x1024.
So in other words, at 1280x1024, the ATI is faster than the Nvidia. At 1024x768, the ATI is still faster than the Nvidia.
Unless you're trying to gloss over the misgivings of something, it's generally best, when comparing two things, to compare them on as close to equal footing as you can. It tends to be more useful for generating a valid comparison between things. Unless of course, one is trying to hide something.