The Switch version includes several quality-of-life updates over the original PSP release:
: Added functionality to save your progress at any point outside of cutscenes or combat. Persona 3 Portable Switch NSP (eShop)
It is important to note that P3P is distinct from other versions of Persona 3: Persona 3 Portable Switch NSP (eShop)
: Runs at a smooth 60fps on Switch due to its simplified visual novel-style presentation. Remaster Features & Improvements Persona 3 Portable Switch NSP (eShop)