That's weird.

I noticed the MobileCityOnline thing as well. It's a difference of over $100 dollars. The keyboard layout is the same. In addition, I bought my N900 from the middle east. The keybaord has only english letters (exactly the same as the US version), and I was able to flash my phone with the US version firmware. So I guess they're exactly the same. (Maybe just where they were made? Mine is made in Korea).