easy Awnser stormtroopers as seen in the last 3 movies are not clones and drafted by the empire so the skill varies. While the clones are as I said "clones" and are all made of the one creation jango fett and are all in posetion of his sharp shooting skills. The reason the empire doesn't make clones is 1 kamino the cloning planet was destroyed and boba fett the last of the clones refused to become the schematic and joined he bounty hunters in the path of his father. I played a lot of starwars games.