Here at MB we look at what is on the cover of a CD. After the cover, we use the spine.
It looks like in both cases this should be:
Title: Classical Praise Piano
Artist: Marantha! Instrumental
I am especially looking at the CD cover for the full title, and the spine for the artist. Tom Keene is only the arranger and Discogs is incorrect. his only credit appears on the rear and the CD as arranger. In the book as the performer. (Even to Discogs own rules that entry is wrong). On the cover and the spine it is Marantha! Music getting the credits.
I think it would be correct to put Tom Keene as the track artist as he performed these tracks.
The label is also Marantha! Music.
I can see that the digital sales are now calling the artist “Marantha! Instumental”. So for digital you can use that different name, but I assume this is just an alias of the same “artist” as Marantha! Music
I would look at other examples for guidance: https://musicbrainz.org/artist/f46e25cf-78b7-4ffd-91c5-aee66cc4e32d