Well Black Ops is nearly totally different. No more stopping power perk – so no over powered guns. No more quickscoping for the haters of it. Loads of stupid killstreak rewards like Radio controller explosive cars and remote cameras.
But the new game types look awesome:
One in the chamber: one bullet to kill someone with if you miss you need to knife. Every kill gives you a new bullet
Gun game: you start with the worst weapon and every kill gives you the next best gun. (Stolen from Counter-Strike)
Sharpshooter:Everyone has the same gun and they switch every few minutes.
Sticks and stones: Only a crossbow, ballistic knife, and a Tomahawk