>>712933380 (OP)The difference is just that SMT has much harder enemies and encounter design that requires you to put more thought into learning the intricacies of the combat whereas for the most part Persona lowballs them hard and you can just steamroll them with whatever.
It's not helped by the fact that SMT fans largely praise and mythologize these encounters like Matador while Persona fans complain about them like with the space boss in Royal requiring you to use weaknesses and press turns to win. This is the major difference between the two moreso than the mechanics themselves.