There's only one unified fan club that everyone joins, whether they're in Japan or Overseas.
OS fans do have a separate ticket lottery, but the seats aren't any different.
I am so freaking excited to see what the tour goods will look like, how the show turns out (please please please let the next album include it on bluray!
), and I know I'm not the only one hoping Ayu releases a vinyl version of "MADE IN JAPAN" XD