In BF3 or Skyrim however, they pretty much trade blows. You really can't go wrong with either. I only recommend the 660 because it comes with AC3 so you don't have to spend more money on the game afterwards
Depending on which review you read, both cards are close enough to call it a draw, so it basically comes down to personal preference.
Please don't use HWCompare. "Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit"
It doesn't translate to actual gaming performance. If you want to compare 2 cards, use Anandtech's Bench