Comparing two releases of “Eugene Onegin”: first and second. The same performers (names available on CD covers), many tracks of the same length. But some tracks from the first release are split in the second release on 2 or more recordings. For example, the very first track from the first release (duration 7:05) is split in the second release on two tracks (durations 2:04 and 4:58).
Looking on discogs entry for the first release, it appears to be the original, since the first versions of it were release as long ago as in 1961.
What type of relationship between recordings would you use in a case of a split, as in the example with track #1 from the first release and tracks #1 and #2 from the second release? “Edit of”, “remaster of”, “later releases”?