In the zone
Headshot will do more damage, but to kill the enemy the damage>health, so if your shot does 500dam and health is 400, instant headshot kill with the head exploding apart.
That's the great thing about RPGs because its not dumbed down like fps. Damage per second, enemy health, weapon range, accuracy %, defense, all these statistics must be taken into account. You have to make important decisions regarding gear and skill set throughout the game to stay competitive.
That's why you have 4 slots, one rifle, one shotgun, one rocket launcher for second wind and one sniper rifle
Yeah but no character is good at all four. You can specialize in any one type of weapon or semi-specialize in two types. Each character is only good at using certain types of weapons. So its kinda futile to keep a sniper in hand if you are gonna specialize in shotguns. Its a bit like Diablo. If you play a barbarian, there's no point carrying a crossbow.