@Diet_Soda@nonamethanks I talked with you two independently about the lower res version of this post #6846135. Update: So it turns out the artist deleted their whole deviantart account and moved to a new one (Rather than just change their name and delete this post like I initially thought).
There was concerns about whether or not this was upscaled with ai but multiple other sources (That linked to the original upload) have this resolution so I don't think that is the case. Infact the place I originally got it from was one of them so I don't know how the first version ended up low res. Though one of them just links to the artists account on whatever site, but does that for all artworks even those with easily locatable sources. So I believe it.
Artist also has a vk with has 90% of their images and is pretty inconsistent about uploading them elsewhere but I can't for the life of me fiqure out how to link from vk despite spending hours trying to get it to work (I am not giving that site my phone number) and for some reason vk uploads are all poor resolution? I don't know if it's due to saving thumbnails because I don't have an account or what not. But this means I was able to find other pictures that had a higher res version elsewhere linking to the old deviantart. SO they are certainly from the artist and I don't think all of them have been upscaled and uploaded to random sites.