God of War Ascension vs Gears of War Judgment: Lifetime sales

[bevochan]

Deyon said:

Nsanity said:

No marketing

Removal of Down But Not Out 

Removal of Humans Vs Locusts

Removal of Horde

No Epic or Limited Edition

Different developers 

Baird being the lead protagonist

God of War Ascension was outselling (Pre-Orders) Gears of War Judgment before it got that 1 advertisement.

If marketing is the main reason behind the poor pre-sales and possibly lifetime sales of GOW Judgement, then is marketing the main reason why most xbox exclusives outsell ps3 exclusives?  If Halo 3 had less marketing and equally to Gran Turismo 5, would Halo 3 sell 11+ million or much less?