[ColorOfSakura]

The US controller is the better one out of the two.

The keys are more rounded to give it a more accurate arcade style feel and they're much more springy (they don't stick as easily as the Japanese keys do).

The only problem I've had with the US controller is that the turntable was really really stiff when I got it, so I had to loosen it up. And it's gotten kinda sticky lately, because I haven't been playing too much IIDX.

But yeah, stick with the US controller - it's a better buy out of the two.