LMAO, thats like asking whats better, iPhone 2G or iPhone 3GS...
Yes, iPhone 2G has a better casing, but 3GS has an overall better package...
Obviously AK2i
What the guy above said, they all ship Worldwide, and yes thats kinda the whole point, that they work on all DS'es.
Why not ask them questions at [email protected]?
The guys are great, I bought 2 AceKards from them, highly recommend them.