"Understandable, personally I just eat the high price of streaming everything from Alexandria[1] instead of tracking down whichever specific site they're licensing from, anyway! So Origami Maria's most immediately obvious difference compared to it's predecessors was that it the artstyle was based off paper origami instead of the pure pixel of previous Maria games, however that was not the only difference as it also had the gradual acquisition of new and unique abilities that were gained while playing through the story, which were unique and had different applications in combat and exploration and opened up new areas, and often themed around the origami artstyle and were gotten through specific befriending and aquiring of party members.
also according to a bunch of people with more refined literary taste then my "they cute girls who are totally fucking" the characters were also deep and complex and had engaging stories, especially compared to previous games."
[1] The library of Alexandria didn't burn down in this Phee's timeline, and at some acquires the legal right to receive, copy, archive and distribute copies of all books/movies/shows, and while they do need to pay expensive license fees for distributing recently released, they're still one specific easily accessible site with every book/novel/tv show/etc saved and available.