Thoughts before leaving ER for awhile.

So ive just finished my first souls game and gotta say it was a blast, I enjoyed every part of it going from different builds to another and restarting the whole playthrough just because I screwed up with some npc's questlines. I even bought a gpu since my old one couldn't handle some of the boss fights(specially the fight with Fortissax). Countless deaths from dungeons, mini bosses, major bosses. Tried to not use summon to some boss fights, except Malenia, Mohg, Godskin duo and gargoyle duos and ofc the elden beast, (I'll try to solo them on my next playthrough).

I want to try play all the souls-like game (im just waiting for steam sale) except for Sekiro im not really a fan of samurais and stuffs. For bloodborne Ive stopped playing it after I defeated Gascoigne since the ps4 gave up on me. So my question is how comparable are the bosses from er to dark souls/bloodborne? I know that in er is an open world and dark souls are linear, so I want to know how is the difficulty on dark souls compared to er?