I like both of them
weapons in COD4 are better(due to modern warfare)
the story is similar (one WWII the other modern warfare)
music is better in COD5
COD5 is a bit longer has split screen and online co-op in the campaign
COD 4 feels abit fresher
at the end both are very similar and very good.
COD4=9.7
COD5=9.3







