Microsoft has published a site, PC vs Mac
There is only one thing you have to know, everything else is fluff.
You will never get a blue screen of death on a Mac. Oh, I got one last night on a Windows machine. With an xlsx half way open and not done yet. Lovely.
done. game over. Mac wins.
And I love Windows, for Development and Business Intelligence. It is the hardware and software that have problems working together. Should Microsoft try to build a PC? Hardware? (ala Xbox?) Would it perform better? Maybe. Would they have more control? Of course, the hardware and software could integrate nicely. I would buy a mythical Microsoft computer before buying a regular PC. Just like I would buy a Mac rather than a Hackintosh :)