If you find the differences interesting, and disambiguate and annotate them appropriately, I would add both.
If it’s not a big deal to you, add them as one with both links.
I don’t believe we have reached a consensus on these kinds of releases yet.
I think that since you were interested and have done the leg work already I would add them separately. The different barcodes are a reasonably significant difference imo, without that I personally wouldn’t.
The market of 5XpO1aHESYiAynxPDHyvFp is [ “JP” ] with a barcode of 859752822510
As you might notice, 859752822503 is exactly “one” lower than 859752822510 (the last digit is a check digit). So I’d say MusicBrainz should record this case as 2 separate releases with different release countries and barcodes (and text script).