If they were both the same price the Intel® Core™ 2 Duo e7400 would have the advantage due to the faster clock speed and updated manufacturing processor but it wouldnt be by much. http://ark.intel.com/compare/36500,30784
Unless you're playing older games or at a resolution lower than 1080 neither will be particularly good. I came from a 2.66 core2 duo and a 6770 gpu at 1080 and BF3 multiplayer was just a lag fest.