I would be interested in evaluating specific softwares on different platform to have a overall result of the application software + the operating system. Example: Photoshop on OS X and Windows 7. Not to determine if OS X is better than Windows 7, just to figure out if Photoshop runs better on one of the two OSs. Very likely it won't and it might be just about the same. And anyway, with different software you might get opposite results, just like different GPUs with different games or different resolutions/details levels.