Also you do have a test with the complete PC measured this is complete FUD.
A "faster" CPU can burn more power and the result can be a lower overall power consuming of the complete pc.
This is "Paradox" but its realistic because if you are faster done with the job you can jump into a power saving mode.
So its possible that the FX8150 burns less power at PEAK and the result is a overall higher waste of power. The fx8350 burns more power at peak but the overall power consuming is lower.
This is a possible scenario and not a "accident"