They are not the same
No, you move the AFC housing to control pre-boost fueling, basically if you move the housing to the front of the engine pre-boost fueling increases, if you move it to much you’ll smoke like a train until boost is applied. So you set the housing so there is minimal smoke pre-boost. Adjusting the star wheel controls smoke as boost is applied, if it starts to smoke as boost is coming up you adjust the star wheel to control this.