Even though there are two editions the regular edition comes with a First Press version. According to CDJapan the First Press release will have a special clear film jacket (which is probably a slip cover with something, like a picture or text, on it) and a picture disc (which I'm assuming means that the disc will have a picture on it). Other than that everything else has already been announced about the release on the official sites.
And I will confess every time even the smallest amount of news about this new release comes out I get really excited. I really miss HSJ actively releasing music and I can't help but hope they can stay active as a group for the rest of the year at least.