Because they haven't implemented all the features you've come to know and love in cyanogen. If you install winner's build and still through the cyanogen settings, you'll notice a lot of empty tabs. I imagine they're working on implementing more features before making their grand debut of certain 9. Winner just takes their current source and latest gerrit submissions and makes a build. We just get to taste CM9 early.
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Sent from my Galaxy Nexus using DroidForums