I don't trust those benchmarking programs very much... I use the games and high load tests (lots of planes, over big cities, sunrise/sundown,bad weather)..
Overall they appear to be the same in speed. The props in Il2 were screwy though, so I went back to 30.82. They had a few new options, and added anistropic filter to D3D, but I didn't check it out in AH..
-SW