Vinicius has always had a much better team. Elite GK that doesn't make dumb mistakes. Great defence. Elite midfield. Very good attack if not elite.
Meanwhile PSG have a GK who's worse than even ter Stegen under pressure. A defence that keep leaking. Very overrated midfield.
Similarly:
Vinicius has been dogshit for Brazil.
Mbappe has been godly for France.
Also, Mbappe's stats are inflated by playing in Ligue 1, it makes up for PSG being worse than RM overall.