I want to make the line between apprentices and students clear here, as both exist. It's the same as the difference between Jedi Padawans and younglings, only without the normal age differential. Students, as we have in this game, are part of the school structure and have no one teacher, while apprentices have been taken under one Sith's wing, taught directly over an extended period.<br/><br/>Also, since they're strong enough to be noticed by a Dark Lord/Lady, apprentices would kick the hell out of a student.