Chrizum on 30 March 2019
Japan has been the reason why Switch has been selling more than PS4 for weeks this year. It is the difference maker. Take it out or make the Switch numbers equal with PS4 and PS4 would be outselling it every week.
Note: I don't care for the PS4. Just stating the obvious that this is more impressive for PS4 with how old it is.
Same can be said for Europe. In fact, the difference is even bigger in Europe, and you could argue it's the anomaly since in America Switch sells better as well.