I mean similar in regards to exploration or openworldyness and maybe in systems like gear/weapons although I get the feeling it is probably similar to Nioh but simplified. Probably has more in common with Wo Long now that I think about it.
The JRPG/Diablo aspect is very much a Nioh touch. Probably gonna research it a bit.
I've never played DD2 but DD1 definitely has a more dynamic world than Ronin. Ronin's open world really doesn't have much to discover but it is pleasant to be a part of.
As for weapons and gear, there are 9 different weapon types in Ronin and each have multiple stances. You can have 3 stances at a time and two main weapons equipped. You also have sub weapons, rifle, handgun, flame thrower, shurikens, clay pot bombs, etc.
One of my favorite things about Ronin is that you can pick a spot on the map and the horse will take you there. I don't know if that's standard in open world games but it's new to me. Granted, you can fast travel but I like feeling like I'm part of the world and there's these small micro combat missions that pop up that reward you.
You also get gear like crazy and they all have perks, you can transfer up to two perks from different weapons to your equipped weapon, wearing a full set of gear gives you bonus perks. You can apply various buffs to yourself or your weapons. Parry system is brutal because the enemy stances have so much variety. It's really difficult to master all attack patterns.
It's such a dope game. I really want to make a detailed video for YT when I'm done with the game but there is so much to cover.
FWIW, my experience with the game shows me that the vast majority of reviewers rushed through the game to focus on DD2 because that game was going to generate more clicks. Ronin didn't deserve all the weird flak it got. Again, not everyone will feel the same about it but it's a really quality game. Outside of the open world that will turn some people off, the other potential fatal flaw is that the game is probably too big for it's own good and the narrative suffers at times. For instance, I have 40 NPC friends in the game (so far), all these people play a role in the story and you give them gifts which unlocks bond missions, these are arguably the best missions in the game but you gotta put in effort to obtain them.
The game is huge. I'll probably put 150 hours in it before I'm done. The 92 hours is pure gameplay, I don't leave my console paused for extended periods.
Also, the coop aspect allows you to jump right into combat. It literally spits you into a mission and as soon as it's done it spits you out. Easy way to grind and get that combat fix if you only have 20 minutes to game. Missions aren't very long.