The theater/pay-per-view and the DVD soundtracks have a few differences. First a few background musics were added in the DVD releases and are not present on the album which was released 3 months before the theater release. Secondly the music when Hitomi has her pendant shaped by the Mole Man, which is also not present on the album, is not the same in the theater version and in public releases versions. Finally only the second half of the music Who will save was used in the first releases, but its full version is used in the second releases.
Since songs karaoke and TV edit versions are commonly unreleased, they are not listed in this category. For the same reason, tracks with some layers removed or added (A capella versions, music tracks without their drums layer, ...) are also not listed.
The unreleased musics include the two different musics used when the Mole Man is shaping Hitomi's pendant (M15a and M15b). Let's also note that most of these tracks contain a performance of the Warsaw Chorus and that there is one track where a Gabriela Robin chorus performs for a few seconds (M31). Finally the Sóra song is used several times, especially at the beginning in an a capella version and at the end in a slower version (M41).