How to compare two laptops: on Win7 and on MacOS? Help!

I ask for advice from the habra people. There was an idea to make a duel: compare the top productive business laptops of identical configurations on Win7 and MacOS (Sony and MacBook Pro), put the laptops nearby and take down typical scenarios of working with them on video. Type: turn on laptops - we see how much each system is loaded by pressing a button. Then we launch Photoshop, open a 300 megabyte image in it and rotate it 90 degrees, do everything at the same time, and see what will be faster. We go online and ship some complicated website, say, on a flash, and do it on the same browser, say, on Opera or on Chrome. Then we archive a bunch of files with the same archiver ... At first they seemed to decide - hurray, hurry to shoot, but then they thought. Is this a correct comparison? At first, they wanted to make such an out-of-box test, i.e. stupidly get laptops out of the box, in the form that came from the store, and start poking the buttons. But let's say, Sony has already installed a bunch of different stupid programs that interfere with the download, and which are not on the Mac - to what state should the system be cleaned? Will the comparison of two photoshop be correct? Well, and so on. I am interested in your opinion - is there any point in this at all, and if so, how to conduct this experiment as clean as possible? Maybe offer some more typical use cases?
thank