either there was work done by aone/anbu on the sound to bring out the more dormant strings in the intro, or the new ep. had a new version of it, the strings and the ending of it really make it seem like a different version, but then again this ep is bigger and clearer, so maybe by compressing it less they saved some sound quality cuz the whole ep in particular sounded way more clear and a whole lot better overall, i would love it if the episodes were all like this from now on