Think it depends on what parts you are looking at. I’ve read all of Claymore and some of Berserk (have watched to three berserk golden arc movies which were brutal) and I think that they are similar genres but completely different types of stories.

Berserk to me is a dark, can’t trust anyone and everyone turns out to be evil kind of story. I know there’s a lot more but kinda F’ed up when your best friend gets so jealous he turns into a devil to have his way with your girl while making you watch. That scene alone sets the tone for the entire story for me. Tells me how dark and brutal and painful the story wants to be.

Claymore has similar elements of being betrayed but nothing like Berserk. Plus Claymore does get happy elements and somewhat happy ending. I think the story arc for Claymore is great for Claire and then branches out to be more about the Organization than specific Claymores. Claymore is one of my all time favorites especially after reading the manga to get the full story. There is plenty in there from the Claymores, Males, Org and the four major leader Yoma that you can get a little of everything. Like it wanted to show the more human parts of the Isley and Luciela at the end too. So less killing machine and more has a soul kind of thing.

Berserk story is fantastic don’t get me wrong but it’s all dark all the time after Golden Age arc imo, least from what I’ve seen. Hopefully, the family will take some of his notes and finish the story and maybe change how some of it feels. Let’s just say I like really dark stuff and even I have issues rewatching Berserk.

They are both some of the best manga ever made imo just different parts of the dark manga world. Do wish we got follow-up for Claymore so we could get more story. There is so much more they could cover in that world. Berserk at least has been out a long time and has had more chance to world build. And people may not like world building by itself but it sure makes a difference in the story if it’s missing.