X vs. XP puts Mac OS X and Windows XP Pro/Home side by side in a huge multitude of categories ranging from usability to appearance to video playback. As you read the comparisons, you get a nice understanding for what goes into operating system design.Source: osViews
I have been meaning to post about this site for some time. It has a mostly unbiased look at all aspects of both operating systems. They keep adding more all the time. They also have a pretty good forum.
