There's no difference - apart from the keyboard.

Mine is from New York as well, therefor I have an US keyboard layout. I understand that the local shops here in Germany would offer a localized device.

The rest is completely location agnostic, as far as I know. WIFI is obviously, so are the other features. I hope you don't think that the N810 is a PHONE, since that would be the most probable cause for problems (different frequencies, standards in the US and here).

Short version: Go ahead, buy it and save a bunch of money.