What is the difference between COD MW3 and COD MW3 Hardened Edition?

MW3 Hardened edition has Special extras, some special unlockable content, and usually a nice case, MW3 is just the game on its own, Although the Prestige edition includes a big extra, CoD Black Ops (CoD 7) had a remote control RC-XD with a built in camera, like in the game, and it was actually drivable xD, but the MW3 one has IR goggles (i beileve) or that could be MW2.