tl;dr: shorter and slightly better arifureta because the author blatantly plagiarized large sections of arifureta

Plagiarism: For those that don't know, Dungeon Seeker started off as a "I can do better" attempt after the author read the Arifureta WN. Imo, they succeeded for the most part. Unfortunately, they stopped giving a shit in the second half and started copy/pasting large chunks of the story with a few name swaps here and there. Dungeon Seeker was more popular at the time, so when the Arifureta creator sued for copyright infringement, the DS creator tried to sic his fans on them among other underhanded tactics. Thankfully, the DS creator lost and all revenue from DS goes to the Arifureta creator, but it still damages the work in question. It goes from being "one of the few properly paced isekai" to "they rushed an ending because they got caught".

Story: It's not nearly as good as Berserk/Revival Man, but at least it never goes as low as Shield Hero. I enjoyed the brisk pace throughout instead of the usual slog through dime a dozen fantasy worlds. Everything tied together nicely, even if it was a bit overdone at times.

Characters: You'll probably end up hating almost everyone, but I suppose that is the point. At least the main character has a proper reason to be cynical this time, and never ends up buying child slaves.

Conclusion: You'll enjoy it if you enjoy trashy isekai, as it's slightly better than your average one.