...alright, I've done a bit of re-reading up on S&S lore, some clarification things regarding The Saltborn/Nameless God as best as I can figure:
> Memory theft seems to be a passive property of the Nameless Island, but an active property of The Saltborn. I.e. speed of thought, not instant/passive.
> Since The Nameless Island is more or less the afterlife for the verse, The Saltborn's ties to that place mean that he would probably show up there upon self-resurrecting.
What this all means, essentially, is that Pyra does in fact have a win condition beyond praying that somehow her reality-warping thingamajig keeps The Saltborn down after death (which there's no proof of as of yet.) Namely, if Pyra/Saltborn are both in the physical world, and Pyra destroys his physical body, then he will most likely reform on The Nameless Island. Though The Saltborn could easily snag and pull Pyra onto the Nameless Island if she were underwater/at the coastline/maybe also inside of mist or fog, it's less certain that he can just show back up in the human world...
Granted, he has the ability to just jump down that well at the end of the game, but even assuming that works there's no guarantee that'll take him to anywhere nearby. So, unless Pyra just so happens to go swimming at the beach following her "victory", then that's probably a victory without air-quotes as far as SBA is concerned at least. (He'd probably eventually show back up for revenge, but that's beyond the scope of this encounter I think)
...which makes it come down to "who gets their hax off first" again. Bleeehhhh.
There's like, maybe a 1 in 10 chance that either one wins if the other gets their hax off first, but all in all... uhh... I guess I switch to Inconclusive. ...which revalidates the entire thread's votes I think?
(Actually, that's a legitimate question- what would Pyra do over the course of 24 hours in Istanbul, in the aftermath of forcibly banishing an angry evil deity back to its home plane? That... matters here.)
(For the record, Saltborn still def. wins if this fight took place on the Nameless Island to begin with, I think, but that's not what's up here.)