Stasis is the only thing in the game that removes all control from players. Nothing else will freeze you leaving you with no option but to die. Smoke grenades might slow you but they are nothing like stasis and the rest of the kit that comes with smoke grenades is usually not worth running.

No, a solar, void or arc nade will damage you but it wont kill you and you can avoid them. A stasis nade will freeze/slow you and that is the end of the fight. Cold snap can track and freeze multiple targets. If someone throws it around a corner /a blindspot you cant avoid it. Being frozen in place for the other guy to kill to you.