Ugg...I'll assume by Call of Duty 5 you mean Call of Duty: World at War.
And to answer your question Call of Duty 4 is so much better. World at War didn't do anything new for the series, it just leeched off of CoD4's success. In fact it went backwards, back to WWII which everyone is sick of.
Owner of 360
Future owner of a PS3 (when it drops to $300)







