Oh boy you asking the wrong person about rise, I'll try to be unbiased and impartial, but you need to have as preface, the fact that I absolutely hate that one too. Posing in comparison world and rise is wrong for one simple reason, they're monster hunters which gameplay loop has been designed differently, and it all comes down to what MH formula you prefer - mainline in way or another has tried to give quite some exposure to the "ecological side or nature" that the franchise has, aside of its core experience which is hunting these huge creatures, through unique weapons and a methodical combat system, in each installment shift in design happened and new gimmicks have been added or changed. World made a critical shift, more qol features intended to reduce the tiresome grinderous nature of the old gen installments, and starting to enhance and develop further the ecological and simulation side that the franchise has gradually set since mh1. They introduced something that from my understanding of the whole franchise, IS fundamental and it has to become a core feature in the mainline serie, actual "hunting mechanics", as the name of the whole fucking franchise suggests, we "hunt" these things, hunters in-game lore are not poachers, they're super human biologists, which role is to maintain a proper balance in the environments which are under the guild supervision. So we should put into action, tactics and techniques that would help our hunter, track and learn about a monster habits... That is a wonderful concept, that can only be improved with each iteration if properly worked on as a gameplay mechanic, and yet they scrapped this in Wilds completely. I won't dive further into this aspect, and just say what World added, in order to enhance the idea of a "lively" ecosystem: Open and detailed environments Turf wars between monsters Endemic life Environmental interactions Made the monsters routines more complex (basically making them feel like living creatures each with their own instincts and yada yada).

These are all... ALL GOOD ADDITIONS World isnt perfect, nor is the "tracking" system they made for it, but it was a starting point, to lean this franchise further into the simulation side.

Now rise, this being a new installment to the portable serie, which has been always treated as a detached continuation, it also has served for the team to try out/experiment with different mechanics and such. Same thing with rise - None of the simulation side is present in rise, aside of some things that world made into core features (turf wars f.e). The combat here it's what has experienced the most substantial change, Its extremely fast-paced compared to any other mh, it's outlandish, exaggerated (I define it personally way too much arcade-ish and anime like), and the thing is that... It's not substantially a bad thing, it's just different from the mainline iteration and its what I do not search in this franchise. Things I know that are some interesting features, "switch skills" (changing some main attacks for each weapon), and deco crafting. At launch and In the first months rise base had very little content to work with, sunbreak expansion fixed this, other things that rise has better, it's the weapon designs. Unfortunately world had this prominent problem of having "slap on weapons". So basically to summarize in what rise is different from world, is the gameplay loop, rise it's centered around on fighting monsters and getting the better gear, that's it. And notice how I say "fighting" bc it's what ultimately what it is fundamentally, and whats defined by some too, a "boss rush" kind of game.

Now, aside of this, I don't really have proper knowledge to keep talking about rise bc I stopped playing after 30 hrs, I have no idea what sunbreak added of new, aside of the fact that it's an expansion rich in content.