Both games are ultimately going have to disappointing sales compared to the predecessers of their respective franchises. Both games are not as good as Gears 3/God 3 (especially Gears), and this is toward the end of the current gen cycle.
I don't think neither game is going to surpass 4 million in lifetime sales. This isn't a comparison of 2 titans. Like Gran Turismo 5 vs Halo Reach or Halo 4. That's a sh*tstorm titanic argument.
Prediction: Gran Turismo will surpass Halo Reach in lifetime sales this year. And GT5 will sell more than Halo 4 lifetime (although Halo 4 still selling well)







