Perks - some of the same from CoD, but renamed.
Killstreaks - You need to collect dog tags to get them, whoop-dee-doo thats so different. Also same killstreaks from CoD (Radar, Airstrike, Helicopter)
Accolades - a lot directly copied from MW2
Create-a-Class - same as CoD, except you have to earn an attachment point by getting kills with a weapon, and you spend that point on an attachment. You also gain weapon points as you level up; you use that to unlock a weapon of your choice. Not very different.
Kill-cam - same as CoD...
You get the point. Theres much more than this also.