I have two, a North America version (pre-installed in the special edition 3DS XL) and a Japanese version (physical copy played on a Japanese 3DS). Here's the long story.
I owned the Japanese 3DS first. I bought it a few years ago to play Professor Layton and the Last Specter as well as Professor Layton and the Miracle Mask. I was a rabid fan and I didn't want to wait for the English version, so I bought the Japanese 3DS to play the Japanese versions as soon as they were available.
Then AC:NL was released in Japan. I saw the special edition console (same design as the one released worldwide this year) that was being sold and I fell in love with it. I wanted it, but I didn't want to buy another Japanese console. So I told myself to wait for the English version, hoping that they'll re-release this design when they launch the game internationally.
Luckily, that turned out to be the case! Happily, I bought the special edition 3DS XL that came pre-installed with the game. After playing for a few weeks, I realized that I could have another town if I want, since my old Japanese 3DS is just sitting in my drawer. So I bought the physical game from a Yahoo Japan auction. Now I have two towns, and I'm really glad they are different region towns because I get to experience the same game in different ways.