Black Ops Vs. Modern Warfare 2

I like Modern Warfare 2 much more than Black Ops for many reasons. For instance, YOU CAN ACTUALLY QUICKSCOPE ON MODERN WARFARE 2! The fact that you can barely quickscope on Black Ops makes a huge difference to me. Quickscoping is one of the coolest things you can do on Call of Duty and now it is completely different. Also I don't like the killstreaks and how they work as much in Black Ops. Let me know what game you like better and why!