[mb-users] Correcting errors vs. listing them as an artist credit?

Hi all,

When should a misspelled artist name on a release be listed as an
artist credit (noting the variant spelling in the MB database for that
release), and when should it be corrected (omitting the variant
spelling from the database, except perhaps as an artist alias for
search only)?

For example, I'm wondering how the distinction is drawn between these
two examples given in the docs:

"Frontline Assembly" (Front Line Assembly), treated as an error to be
corrected, at
http://musicbrainz.org/doc/Style/Principle/Error_correction_and_artist_intent

versus

"SPY" (S.P.Y), treated as a name variation, at
http://musicbrainz.org/doc/Artist_Credit