I sometimes see a not very well written answer that does not appear to be plagiarism, but that only contains information that has already been provided in previous better written answer(s). They often have comments like "this adds nothing to the accepted answer". I usually downvote these answers as they are not helpful.
However, I occasionally come across answers like this in the Low Quality Posts review queue. Even though I believe the answer deserves a downvote and it wouldn't bother me if it was deleted, I'm not sure that it falls the the level were it needs to be deleted.
What is the community consensus on deleting answers like this?