Canon does this all the time. I think they might be exactly the same model but named differently. The US market prefers X, fewer numbers, short tags and so on. In terms of video quality and format, I think there is no worry now.
I was looking at this camera myself when it came out and I finally decided to get a Nikon. I was also thinking about the 500. You really have to want the HD video feature to pay the premium.
EDIT:
Of course if you are in Denmark and ordering from the US, you'll have to be aware of the additional duty that you have to pay and the warranty issues.