User blog comment:Damac1214/Mob of the Dead Development Interview/@comment-1263839-20130517073249/@comment-25496444-20130518083941

At least for me, it's a little more than just slight graphics change and new weapons. The WaW maps felt a lot different in BO, it's likely the case here if it happened. One thing they could do is the same they did with Studio: the layout is the exact same, but the setting and theme is different.