Titanfall - it's deserved win for that week.
But it's still funny how people only use UK as comparison. It's mind blowing how bad XO is selling in continental Europe (whole Europe minus UK) - it sold mindwhooping 6370 units this week in whole continent of hundred million people. This is incredibly low amount, less than Wii U.
In week ending 1st march, in which XO won USA and UK, PS4 sold 35k units in continental Europe, and XO sold 6k. This is almost 6x more.
As of buying advice, look for games, nothing more. Choose best for you and get that console. If you like multiplats, buy PS4, because they better on that console.