Originally Posted by Apokalipse
they're about even without AA, with the 4850 performing better with AA.
We've been through this before.
I think you didn't look at benchmarks page by page
In campany of heroes they did run at 8x CSAA, and 9800GTX+ performed better
Read the line above the chart
Legit Reviews - ATI Radeon HD 4850 Versus NVIDIA GeForce 9800 GTX+ - Company of Heroes
In Tomb Raider: Anniversary they did run Nvidia to 16x QAA while the ATI to 4x. So, it is not very fair comparison
I believe those the only games that benchmarked with AA enable. The other games benchmarked without having AA enable, and 9800GTX+ performed in majority of those games. So, this at least refute your theory about performing even without AA.
Personally, I say 9800GTX+ performs better most of the time without AA, while HD4850 performs most of the time with AA (though not all the time)