http://www.mcvuk.com/news/read/titanfall-vs-infamous-two-next-gen-exclusives-compared/0130069
Well, we know that InFamous helped PS4 hardware sales jump by 106 per cent week-on-week. Titanfall, meanwhile, helped Xbox One to a 96 per cent sales boost.
MCV has also been told by a trusted retail source that Titanfall sold just under double the amount of units its first week than InFamous managed in its debut week, although of course Titanfall sales fell around 75 per cent in its second week leaving it behind both Sony's game and Metal Gear Solid: Ground Zeroes.
MCV can also reveal that around one in four UK Xbox One owners purchased Titanfall. Meanwhile, around one in nine PS4 owners acquired InFamous: Second Son.
Take from that whatever you can, I'm a bit too busy to work out any numbers.
Presume the "double" figure is only referring to Titanfall XB1, too.