The guts are completely identical to a X-Gene HTPC case (the only difference is the bezel), which makes me believe that Aerocool obtained a license to sell the case outside of the us. If I had to guess, they probably cannot sell the case legally in US.
Of course most of this is really speculation, but it makes sense.
Any reason you dont want the X-Gene? Or is it just aesthetics (which I can understand). I own one of the X-Gene cases, and its not too shabby.