idk both real fun. Umm i would say story wise 5. Multiplayer is a tie. If 4 had more guns and a level with a vehicle i think it would win but idk both fun.
Honestly, i think COD 5 is waaay better. More better weapons, more better moves, better sniping and better campaign. Plus the zombie level at the end is freakin awesome!
I have then both, and i like them both. CoD4 has modern guns,
-My problem with 4 is that some of the guns are over powered (M16 = Over Powered), and the maps suck. -My problem with WaW is that some maps are too big for TDM and Tanks are kinda stupid. Hit detection is kinda Bad.
-What i like about 4, The Modern Guns are nice, and the modern time, and my ability to go 35-3 in TDM =) Camos for the guns are cool too. No Tanks lol -What i like about WaW, The old WW2 Guns, and you can put Dot sights on them! also i Like the Map Styles.
Basically if you like 4 you should at least TRY WaW, i mean its the same Engine and everything so its runs almost the same as 4, just WW2 style.