different skillsets... Shotguns are for folk with good mobility fast thinkers and even faster fingers... (Snipers can be used in a very similar way as shotguns utilising the same skillset "aggressive recon" style) Snipers in the main use tactical thinking in their positioning (controlling sightlines) and need great aiming accuracy and fast target acquisition to be successful (don't need the run and gun abilities of the shotgun user but better tactical thought and accuracy) In battlefield 3 an interesting study of the playstyle/skillsets of differing age groups was conducted and found that older players tended to play slower and more tactically and the younger guys relied on their fast reactions (younger players scored higher but older players had higher k/d's generally speaking)