FPS War Graphically

Battlefield 3 took the world by storm with its impressive and most realistic Frostbite 2 engine. Modern Warfare 3 refreshed its old ways with the Modern Warfare 2 engine from 2009. An estimated 14.7 million people are playing one of these games. However about 35% of users cannot tell the difference between the games, graphically and physically. Recently there have been ads comparing Battlefield 3 to real life. It's difficult to tell the difference between it all. MW3 has the distinct graphics of 2009. An old burden renewed to bring back a repetive game. So which one are you playing?