i absolutely hate these questions...what game is better...i mean wdf,,what do you define as "better"....they have thier own pros..eventho they are both FPS, they are different in many ways
As said above, MAG is totally team based games which emphasize tactical and strategic gameplay...ur not gonna find a "free-for-all" game mode...however u will notice how low quality the graphics are and the simpleness of the animations e.g. grenade throwing..this is understandable..im sure MAG's MP will dominate..well until cod7 and the final mw (MW3)
MW2 - emphasis on the actual gun fighting gameplay, graphics, animation..not so team based and sophisticated..its smoother and the environments are better designed (imo)
So reword thE question to: "which do you PREFER?"
I prefer MW2, simply because im a fan of the cod series, i prefer good gunfighting gameplay..and i just like the style and system of it..also the great tricks you can do e.g. no-scopes which you cant really do in MAG