Surely the over riding priority here is Artist Intent? What did they originally want? What is in their discography on their own website? What do they call the album when talking in interviews. It is their work.
I have added CDs to the database where the spine clearly had a typing mistake.
I have seen early album releases with typing errors. Later releases with those errors corrected.
We have UK albums released in the US with clearly confused typos added by the USAians attempting to work out what “colour” is.
Compilation albums should always be treated as dubious as there we have some company just trying to make some cash by slinging a heap of tracks together.
Same with Amazon \ iTunes \ Spotify - they don’t really care about accuracy as they are a shop.
The Artist on his\her own site, YouTube, Facebook, Twitter, etc is what I treat as key.
Personally if I am looking at a CD in my hand I am more likely to trust the REAR cover. Followed by the booklet. If I see the title written in different ways on that same release, then I will use the most common version. So if booklet and cover are the same - I’ll use that.
It will be almost impossible to make a single rule as this will lead to arguments when someone wants to pedantically follow the rules and add in a title that is clearly a typing mistake.