many people clam that Windows 7 build 7057 is the release candidate (RC) build , but certenly pretty close to being RC .
Rather than publish a series of synthetic benchmark results for the different operating systems and builds (Microsoft frowns upon benchmarking beta builds, not to mention the fact that the final numbers only really matter for the release candidate and RTM builds), I’ve decided to put Windows 7, Vista and XP head-to-head in a series of real-world tests to find out which OS comes out top.