Honestly all the Dark Souls games and Demon's Souls are all very similar. Even Bloodborne is extremely similar despite being the worst of them all and a bit more dumbed down and easy.
Dark Souls 1 is the best though, then comes DS 2 & 3 and Demon Souls, then Bloodporne.
Dark Souls 3 is a bit easier than the other games, took slightly much from Bloodbon in my opinion - too many fast movements makes combat easier, I can easily roll-dodge everything now. Plus they remobed armor upgrades sadly, plus it's more linear, plus visually it borroed from Gofix-19th century/vampire/lovecraft/London/victorian instead of concentrate on Medivial environment style.
Pluses are the amazing world design, atmosphere, that it's bruital, grim dark. And the graphics are incredible - best in the generation so far. So fantastic. I can't believe a game has such amazing graphics. My eyes are overstrained because of the good graphics, I want to look at every detail all the time.
Thank you life for this games. Fantastic. I'm so thankful for these games.