Last but not least, Company of Heroes: Tales of Valor,
the gap is merely 3.5%
The gap opens to 5% with 4xAA & 16xAF.
You can see from the result that both cards perform at a similar level, with the GeForce GTX260+ edges out by a small margin in most games. Given both cards are selling at the same price, the Nvidia card definitely makes a better choice.
Part 1: Introduction & Specification
Part 2: Test Setup
Part 3: 3Dmark & Call of Duty 5
Part 4: NSF:Undercover & FarCry2
Part 5: COH: Tales of Valor