According to the chart, we're talking 77.6M vs. 77.5M. That's really splitting hairs about who is 'first.' The part that's missing here is that those stats are

According to the chart, we're talking 77.6M vs. 77.5M. That's really splitting hairs about who is 'first.' The part that's missing here is that those stats are after ~8 years of normalization. Many people that only bought a single console at first may now have two or three from that generation (i.e. could only afford one console, but over the course of close to a decade could save up and buy one or two more, especially after price drops). The PS3 was also one of the first BluRay players, and IIRC in Japan Sony is a more trusted brand than Microsoft (or at least was). These are all factors at play here.