The BD are the same exact masters as the HDTV versions except for II which got a restoration from the o-neg.

How much DVNR was applied on these older existing masters is up for debate but every film clearly had work done.

I think star trek I might just be from an earlier HD transfer with the DVNR already applied but i could be wrong.

Also Trek VI looks like an inferior old transfer and not the result of DVNR. As far as i could tell.

III-V however are really heavy DVNR. And no reason as to why it was done.