Battlefield and Call of Duty the biggest, bloodiest shooters on the market - are constantly competing with each other over hardcore shooting fans' love, dedication and money. But for two franchises that launched within a year apart back in the early 2000's, their paths to current stardom differ wildly. As we prepare for Battlefield 3 and Modern Warfare 3 to go head to head this fall, let's take a look at the hard stats that got both of these juggernauts to where they are today...