Modern Warfare 2 is obviously better because it's new and updated, but personally I had much more fun when CoD4 came out with all my friends racing to 10th prestige having a blast everyday. For some reason no one really gives a shit about modern warfare 2 partly because of all the campers causing them go negative and give up on it. I am going back to play a bit of CoD4 soon.
Ayye, I say COD4, as in weapons and more realistic and you can actually Dropshot <3.
Then I'll say Modern Warfare 2, Maps, features, and perks.
I like COD4 better though YuHDiiG!
And wrong secton (Y)