So so far katakuri is the only confirmed special paramecia we know of. Him being classified as such due to his mochi fruit basically giving him access to a logia like body
With him not only able to produce the substance but he’s just straight up made out of it. The only reason he isn’t a logia is because mochi isn’t a natural substance
Imo fruits that permanently and passively alter the users body might be more “special” than the average paramecia
- Like the dice fruit for example seems to always be active so maybe it’s more unique than originally thought
- Alvida’s slip fruit might also fit because it also seems like a fruit that changes the users body regardless of her trying
- Idk if it counts but kuma’s hands seem permanently effected by the paw fruit