Unless I am mistaken, that reddit poster is accusing the artist of plagiarizing, but the evidence is only from some preproduction reference images and spotlight

Unless I am mistaken, that reddit poster is accusing the artist of plagiarizing, but the evidence is only from some preproduction reference images and spotlighting elements that are not in the actual final work. This piece is a commissioned book cover so it would be expected that he slapped together a 'demo' for the author to approve before making the final work.