Well the ps4 selling much better in europe is becauae ps sells MUCH better in smaller markets. And EU is a jumble of smaller markets. Even if switch is neck and neck in the big 4 (italy, UK, france,germany), the combined weight of the other 20+ countries probably outweigh them.
On another note the US market looks so fun. Its been a decade since 3 systems were running so closely in paralell like this.







