There is substantial continuity between these two plans and their aims are largely similar, but there are also important changes as well as fresh activity from year to year.
Mae llawer o ddilyniant rhwng y ddau gynllun hyn ac mae eu nodau’n debyg i raddau helaeth, ond mae newidiadau pwysig hefyd yn ogystal â gweithgarwch newydd o flwyddyn i flwyddyn.