added and updated: i just notice that the remastered version of subspace theme has more melodies added to it than the original nes version.
at 13 seconds of the remastered version, it repeat the melody somewhat then at 22 seconds to 31 seconds of the song, it added newer melodies that weren't found on the original nes version. so was 36 seconds to 55 seconds of the remastered version of song, it has newer melodies that weren't found on the nes version. interesting.
actually, i got curious and listened to the original nes 1st super mario game main theme overworld and it has all the melodies that the snes remastered version has for the super mario 2. so that might means the nes version of super mario 2 shortened the song maybe because the area that this song used, the time spent weren't long so they shortened it probably to save memory.