Three identical shotgun shells. One shotgun. Three choke tubes.
Three different results.
Each produced killing shots, but if there is such a thing, some were more dead than others.
Patterning a shotgun for any type of hunting is important. Just like ammunition in a rifle, not all shotguns shoot all shells alike. The important thing to know when it comes to shotguns is that once you settle on the shells you are going to use, you have to determine which choke gives the best pattern downrange.
The question is as important for turkey hunters as it is for duck or dove hunters, but there is a difference. For turkeys it is important to get the most shots in one tight location while for flying birds you want as many pellets as possible within a 30-inch or so diameter.