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I wish I had the time to test it for you...
That said, I'm not really too worried about it, as it is what it is, since we are forced to update anyway. Its good to know for benching purposes though if other OSs aren't as fast and we are forced to use 10/its latest versions (for retail people).
EDIT: One thing I JUST noticed is that it appears your settings are actually different in these runs. Look at your screenshot... see how under settings two say Custom/Ultra/Extreme and the other two are just Extreme HD? I wonder if that has anything to do with it your results being different...try running both again with the different settings and see if you get the same results in the same OS.
Heaven extreme defaults to windowed 1600x900, i always ran it at full screen 1920x1080. 100mhz CPU speed does NOT make up for that difference in results.