ok baased on my spectives.
gears you can move around when your about to die
cod you are either dead or in your last stand.
gears can hold 3 guns
cod holds 2
gears has main characters for the whole series.
cod has different chracters for every games
i dont know which has longer story mode.
geas horde mode goes up to 50
waw goes unlimited
epic fail-if your going to f**k up anyway you might as well f**k it up in such a way that it leaves people wondering how in the f**k did you do that!