To my understanding, paratheraps was created for p,briedori. This fish is considered different enough from veija to have the paratheraps tag.
From the remaining veija species nomenclature is really a matter of opinion.
Without further dna analysis or deeper studies veija can be either,veija or paratheraps depending how the experts see the fish.
To me, except for briedori they are all veija.Briedori is the only one I see a significant difference in when comparing to the other veija species.
To make it simple,it's no more than a matter of opinion depending on which expert you ask.
Taxonomy is not always an exact science.
Hope this helps.