Days Gone isn't a bad game but some of the posts on this last page are giving it way too much praise. Even when played on a PS5, it's a pretty janky experience. The whole things doesn't feel like a Sony studio game, it lacks that typical polish and solidness I've come to expect. The gameplay is painfully average until pretty much the end/post-game, when you're going up against the larger hordes (mostly optional).
Narrative and characters were all over the place, the world design was decent but ultimately fairly dull both from an artistic and technical point of view. Honestly, in all those categories I'm not sure I'd rate it above 2015's Mad Max, to give an example. Competent but unspectacular, a routine 6-7/10 game.
As for being better than Ghost of Tsushima, I just don't see it. Both have similar flaws in many areas but at least GoT lacked the bugs/jank, had a more interesting visual style and has combat that is leagues beyond anything Days Gone offers. Even so, I wouldn't necessarily rate GoT any higher than "pretty good" either.