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Seriously. And frankly, haskell-lang.org looks a lot like haskell.org

This is the same design. And the person who donated it to haskell.org asked them to stop using it[0]

First impressions can deceive

It may appear so because haskell-lang started off haskell.org's content. You can look at http://github.com/haskell-lang/haskell-lang/commits/master to see the work that went into evolving haskell-lang away from haskell.org