In total it's just so much better put together and they all last a decent amount of time. They all have great storylines too. Little awkward on the aiming at times but can be loads of fun and scary stuff.
Anyone who actually posts here saying COD has to have played RES. Otherwise it's a biased opinion.
It depends on which genera you like better. War or Horror. I would have to say the Call of Duty is better because of the realism. But it is your choice, they are both first person shooters so how could you go wrong.
