Most Xbox One features are not in Europe. Also, Microsoft still not shipping Xbox One consoles in half of Europe countries because it has no Kinect voice feature yet.
Also most apps, TV shows and store is only for Americans. Those features are not in Europe. Looks like Microsoft is focusing more for USA meanwhile PS4 is for everyone. It´s just a gaming system and all countries has same features(most).
As a european, it´s very simple why PS4 outsells Xbox One. When Americans buys what is cheapest, then European buys what is most quality and powerful. Americans buys also cheapest phones, Europe phones sells crazy that cost most. Same thing with TVs, cars, everything.
Wii U is dead in Europe. Why? Because Nintendo - Europe Region just simply does not exist. Why we want to buy console that is only for USA and Japan region but not Europe? Also Wii U is just too weak(i have all 3 consoles but im saying that most people are saying).
When PS3 came out in Europe and cost 600 euros while Xbox 360 cost 300 euros, then PS3 was still outselling Xbox 360 but not in USA. In USA still most people bought Xbox 360 because of cheap price.
You want region lock, or region stuff to make, we europeans not buying. We love freedom, USA not.
This is why Xbox One and Wii U consoles not selling well in Europe. In short. Europe will not buy Americans stuff. We don´t need America stuff.