The Fury said:

I find pre-orders weird. Are there really more Xbox One owners who want Titanfall than Xbox 360 owners want Titanfall? Or maybe it's just a case that those people who are likely to pre-order a game at all, are also likely to pre-order a console.

They might be the same game by name, but the 360 version has less than half the players the One has and also much smaller maps. Its essentially like Titanfall 1 vs Titanfall 2 as far as 360 vs The One/PC.

So it does not surprise me that the One will massively outsell the 360 version. It will also sell Xbox One HW because of this.