User blog comment:KATANAGOD/Black Ops 2 information according to 'Gadget Show Live’ Brochure/@comment-65.199.210.162-20120412125740/@comment-92.84.102.108-20120412184220

Indeed, survival is (for me at least) better than zombies in the sense that you have more variety in terms of combat, not just leading trains of zombies around. Although tbh, on later waves of survival the enemies just become bullet sponges and it becomes less and less fun. If they relied more on making the A.I. advanced, they could have got around this problem.