Windows 8 has reached its "release to manufacturing" (RTM) state, and Apple's Mac OS X Mountain Lion has been out for a few months, so now's the time to pit the two new operating systems' performance against each other. Even though each OS is in its final state, there are still a few caveats: the tests were run on an Apple laptop, since it's not feasible to install Mountain Lion on anything but Apple hardware. This means that Apple gets the advantage of tuning the OS precisely to the hardware configuration. Windows, by comparison, must run on a huge array of different hardware combinations from many vendors.
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