As an interesting data point - a common gauge of a game's sales success (now that SteamSpy numbers are just made up) has been looking at the number of Steam reviews.
They correlate in the broadest sense here (~20 to 40 copies sold per review).
Horizon - 3.3M sales - 80k reviews - 41.25 copies sold per review
GoW - 2.5M sales - 81k reviews - 30.86 copies sold per review
Days Gone - 1.7M sales - 50k reviews - 34 copies sold per review
Spiderman Remastered - 1.3M sales - 61k reviews - 21.3 copies sold per review
Uncharted Collection - 480k sales - 11k reviews - 43.6 copies sold per review
Miles Morales - 450k sales - 20k reviews - 22.5 copies sold per review
Sackboy - 62k sales - 1k reviews - 62 copies sold per review
Sackboy numbers being so low obviously throw off the statistical viability, but the rest hold pretty decently.
Horizon was the first one iirc and it probably greatly benefitted from being the first PS game to release on PC.
Definitely this (it was an "event game") but also, it and Days Gone have been the lowest price out of all of the ports so far (~$15, and PC users tend to be more price discriminating) . Which also explains Days Gone's somewhat inflated sales compared to where it would sit in the pantheon of these games on Playstation.
I would be curious to see the revenue breakdown for these titles, as I bet God of War outstrips Horizon, even with the lesser unit sales.