Is one of these meant to say the reverse? I am not sure what is being asked as it sounds like it already does what you want. Apologies if I am misreading or confused myself.
If you want to copy comment/rating/tags/labels separately or in addition to other things, that should be possible via a script. If you look at the root post of Scripts (JS & VBS) Snippet: Enumerating files and metadata tags, the second half starting with heading Other types of metadata tags: has some relevant code for reading and writing certain metadata values.