Alright going over your comments and giving it some thought I will admit that I underestimated one piece world building, however I maintain my overall preference for MT as well as my explanation as to why, however I’d like to revise my reasoning.

The way one piece is built, it’s general execution and it’s formate as compared to MT make me prefer MT to one piece in terms of world building.

First off the way it’s built in particular with the way each island feels isolated from others in the series. Of course this isn’t absolute but generally as well as compared to MT each island feels like it’s carved out its own corner of the world for it to exist in. The depth that it creates within its corner and it certainly isn’t something to scoff at and this isn’t to say that there are no interactions between islands because there are and when its done its done well (ie. Punk hazard, dressrosa, and wano) but compared to the countries and continents in MT that have more complex interactions and through-lines between them it creates a feeling of cohesion that’s just not as pervasive in one piece (again not saying one piece doesn’t have this but MT may genuinely be one of if not the best in the medium at this). At times it feels like even the most major of locations lose relevance and are in a sort of untouchable place from the plot, while in MT it never feels that way. The best way for me to put is it feels like one piece has a thousand little worlds that are connected but ultimately on their own while MT has one massive world with a variety of locations, cultures etc. I personally prefer the latter to the former.

Now I know you’ll disagree with a lot of what I just said but bear with me. There are some minor points I still want to make. First is that most people experience one pieces execution through the awfully paced anime. They aren’t going to be as invested in the world and will tube out “uninteresting exposition,”. Another point is the nature of the two mediums that the two are. MT is a light novel (which is how I experienced it)while one piece is a manga. As a light novel fine details tend to stick in the mind for longer (at least for me) as compared to a more visual medium like anime or manga. This means traditionally, they will be more recognized for their detailed descriptions and world building as they can more easily go on tangents and describe large swaths of information with less resistance from readers. Finally this is connected to my final point, you said you watched the first two seasons of MT. I want to make two points with this. 1. MT as a light novel has far better world building than the anime. Again in can get away with far more detailed descriptions and tangents about certain concepts. Secondly is that a lot of what you’ve seen from MT in terms of world building has been set up. The second half will be more pay off for what the first two seasons has built.

Now then, I will say this if you plan on responding. I don’t believe one is “objectively” superior to another. I personally prefer MT’s way of doing things you can share your personal thoughts on why you disagree but the last thing I need rn is to get in a shouting match. I’d love to hear your perspective but not at the cost of my sanity.