He seems to implying the main differences are in pronunciation:
"Zlatiborian uses the Ijekavian pronounce, while Serbian uses the Ekavian. [...] Most of Zlatiborian words are differently stressed than Serbian.
This isn't relevant to Wikipedia since it's only written, not spoken. Where projects are moving towards spoken versions ([[meta:Wikisound]]), there's no reason to not record multiple versions with different pronunciations.
Angela.