Plot: One Piece, while it got retconned during the years it went on, the premise is the same, HxH should have been finished after the Election arc, and now it’s drifting randomly with a cast of princes not even the most devoted fans know the entirety of their names without looking them up, and the vague hype of a new unexplored continent. One Piece, I’m still puzzled, people say it’s to free the world, global peace whatever, but there are situations like Hiyori, the treatment of the Big Mom pirates that still leave me dubious of its conclusion 1,000 chapters in.
MC: Gon, both Luffy and Gon are mentally unstable chosen ones, but Luffy somehow managed to be more special, and the whole bit about zoans having a will of their own, and Oda never explaining what Luffy means by “most free” and why he’s so interested in it, paints a disgusting, indefensible picture.
Side Characters: I’ll give it to One Piece, even in the fandoms, you see a lot of passion about even minor characters in their role of the plot and/or strength only replicated by Hisoka vs Chrollo two stocks underagebaits
Villains: One Piece, villains in One Piece get trashed a lot, but it often happens after their role is over, Oda cares about them, HxH has Pariston as the best, but he cannot carry the ship by himself, especially when accompanied by the bomber guy.
Designs: OP, absolutely, Togashi designs are too normal, while Oda is definitely a manlet obsessed with height, he’s able to create impressive designs that separate the wheat from the chaff, of course, he’s also able to create downright horrible designs, or straight up copypaste others like Katakuri being Guts, but it just accentuates the good ones. I look at the Zodiacs, and I see a bunch of hastly thrown together jobbers, even the main characters cannot escape that, as Togashi is obsessed with drawing kids.
Power System: HxH while I don’t like much nen because it lacks a Jungian element, Nen is undeniably better than haki.
Story arcs: One Piece, we’re still counting pretimeskip, and it’s not like HxH had always perfect arcs.
Incorporation of themes: One Piece. Derrida deconstructionists like Togashi are a cancer in literature, I could not believe he tried to copypaste the whole Black Book plotline in this other manga as well, the same manga that has at the start prospective hunter facing a trial to become hunters, and then get casually killed during the test just because, maybe YOUR humans are no different than insects, as they’re a caricature of what you think military institutions are, with no concrete knowledge of them, and the entire waste of resources said methods would bring, not even talking about morality, as that’s another can of worms.
And, just like Naruto, he tries to bring in the concept of the futility of revenge, Kurapika refuses to kill the Spiders, if this was real life, he would have doomed himself, as the spiders would see him as a threat regardless, but since this is a dumb shonen, pardon soft seinen, those problems will never arise.
All these scrambled messed up ideas, Hobbes already elaborated much better than he ever could try, ages before he was born, put on a pedestal by fans to hide their fanboyism in a manga about “12 year old unstable brat becomes the strongest after getting mad, and wish granting child removes all consequences”
Art: One Piece
Imagery: One Piece but ehhh, it’s not really that great.
Panelling: I’ll give it to Togashi, Oda always has this problem that he can’t let panels “breathe”
Originality: One Piece no contest
World Building: still One Piece, but it’s not the end-all-be-all it’s touted to be, characters and places are frozen, waiting for the Strawhats to arrive and do their plot.
Characterization: Hmmm, Oda has become lazy, but he knows how to emotionally manipulate his audience much better than Togashi
Enjoyment: overall, One Piece.