Also, they don't actually make dead cells, motion twin does
I am the complete opposite, I liked both, but Hades easily is the winner for me (and I am saying that as one of the very very early dead cells backers). Because they managed to refine the roguelike gameplay to almost-perfection, but the storytelling and writing are on a whole other level compared not only to other roguelikes, but a lot of games in general.
My advice for Hades is to give it about 2-3 hours of try, and then decide if you want to play more. Mostly because it takes about an hour or two until the game gives you all the essentials before releasing you into the world where you can play it "for real". Sort of like a less extreme version of Red Dead Redemption 2, which requires you playing 10+ hours to finally to be able to play it "for real" (referring to having to get to chapter 2 or so, before you can free roam and enjoy sidequests and start doing things at your own pace).
Super fun and cool, but given the context of their previous games, def in the iterative camp.