i think the K2 is waaaaaaaaaaaaay much better WHY?,here is why:
-Three types of selective fire (Single,Burst,Full auto)
-If you are a little attent you will notice when u switch to burst the crosshair and re coil are reduced a lot,,and If u are in a sniping position SINGLE FTW!
-It seems that (in my experience vs medium armor players) one burst is KO and in light armor players 2 shots are enough
-the recoil is wonderful,it better than the ak!!!!
-for some reason i think is GOOOODLIKE,the wep is (i think)korean or japanese,that explain why nexon gave it so much power (nexon u have to balance the weps!!!)
-full modded it KICKS ASS!
and the ak...
well...
its an ak,what more i can say,but dont take mistakes,the ak-103,MOOOOOOONSTER KILL kill the K2,it has a better recoil
thats my opinion