i think its the same...MW2 had more action...in Black ops...mason was taken by CIA for interrogation... Reznov was just a Illusion... at the end Mason remembered everything...The last map is on a Ship... the BEST weap i ve ever seen in CODs is CrossBow(with bombs :D)
Call of duty black ops/ assassin's creed brotherhoods/ ghost recon future soldier/ H.A.W.X 2/ Crysis 2.......(and more...but i dont know their names yet:D)