I’ve seen 4K upscale version before. But this is different and seems definitely remastered in certain areas.
Edit: here is the 4k version. One thing different is the shadow of voyager on the rings in the remastered don’t seem to appear so making the impossibly small planet not a thing anymore.
There is only one tiny way this could be better - in the original intro, the nebula parts just ahead of Voyager’s prow thanks to the navigational deflector. Replicate that one little bit and it will be perfect.