In my opinion is not which game is better if not the company that made them, Activision change the way of playing Call of Duty. I believe that in some sort of way Modern Warfare 2 is still a great game because you have Challenges, here too, but your weapons, titles, and emblems are based on making them/ purchasing them not making challenges or anything although it has it's challenges I believe that it would be cool to follow the line of the Modern Warfare 2 style, but yeah, as it is a different developer they wanted to change the line so they have clearly made a whole new different game, you can't really compare them. I enjoy both.