with that example i’d probably argue that it was a mistake (depending on the gap between when it was uploaded and when it was changed) and change the original release to appropriately include the featuring credit. i’m not familiar with that artist though; some people might feel differently.
actually, i think we do tend to treat these as new releases, again depending on the context. if the original had a typo that was corrected, we’d correct the wrong spelling on the original release. but if some tracks were completely changed or the coverart was swapped, usually people will create a new release for that.
i added one of these cases today actually. this was released in 2012, but two tracks were changed in mid-2018
it can get kinda messy when a release was updated multiple times, like here
i don’t know the specifics of this release; i just went through the updated release tag
or here
or when you have no idea when the change was made, like here
edit:
here are some more forum discussions about this! there are quite a few
another edit (sorry, i keep remembering things i didn’t say)
if the release is CONSTANTLY evolving, like new songs added every week, usually people won’t add a new release for every single one of those, opting instead for a series, or holding off on adding the release entirely until it’s ‘completed’.