i dont get why people are still saying world at war is made by different people. treyarch and activision merged. world at war is call of duty 5. the company making 5 is the same as 4. the graphics engine is the same. after playing, its much better then 4 imo and basically every1 that ive played with so far has agreed. maps are muuuuuch better, weapons are way more fun. sound is better and gameplay too. WW2 is so much better. having a random helicopter shoot u thru a wall from the other side of the map sucked. the whole dog idea sounds dumb, but when you play its actually awesome. you can defend yourself against an attack, but they're vicious dogs.
the diff between WOW and GOW2 would be campaign vs multiplayer. GOW2 multiplayer still kinda sucks, but campaign amazing. WOW campaign is pretty good, but multiplayer is fucking amazing.