I think https://musicbrainz.org/doc/Style/Recording#Edits can be interpreted so that (A) and (B) should share the same recording.
In many cases, a released track will feature the original recording produced from a performance. However, there are some important cases to consider where this is not true - these are discussed in the following section.
An existing recording can itself be edited to produce a new recording. For example, a “radio edit” or “single edit” may be produced by removing an intro or outro, verses, bridges or interludes to shorten the existing recording, and/or by censoring some of the content. Other examples include an edit using only a section of a recording or an “extended edit” which repeats parts of an existing recording to increase the duration.
Where a fade is added to the first or last section of an existing recording, this is not an edit, as the section is not removed.
@Freso Can you clarify?