Hi Stublerone, Il2 was always better on Nvidia cards due to it's better drivers/handling of openGL. With the two new cards to choose from it depends on what games you want to play but both do well enough to make it not matter. In the
Toms Hardware list they come out equal due to the nature of the different cards working better with different games. You can get a per game speed test on Anandtech if you want to investigate further.