maybe the fact the gameplay is way harder in vanilla so give it a different feel, basically royal is way forgiving in its gameplay but story wise not really at the beginning that isSo it's more of an update/revision not a sequel. Will I miss anything by just playing P5R?
the moment you reach the final arc, each game have their own True endings because of a few differences, mainly because of the new characters.
basically royal added a whole third semester that is totally new, meanwhile vanilla didn't have that, it ended before causing the two games having different endings