To be honest, matters more what you want out of your game. 1 Is a really fancy mystery, 1 is a basically a very fancy roadtrip, both are excellent, but both require you to be in a certain mood to really enjoy them.
Welcome to Bluesnews
But do not ever base your buying decisions on forum comments. Would you enjoy a road-trip and exploration? Or would you enjoy mystery and suspense? if you swing towards Persona 5 then that's what you gotta get, but remember, both games are basically "over" when you are trough them. So maybe you can buy them used and get both for the price of 1 full price... ,p