Information superiority assumes lapses, and potentially in critical areas. The power of information is receiving more and more emphasis. Joint Vision 2010 sees information operations as a key in preventing hostilities before they begin. Even if combat does start a rapid cessation may be achieved if the opponent concludes he can't win. It is information dominance that describes the leveraging of information to this level of significant psychological impact - superiority cannot make that kind of impact.
Dominance implies a mastery of the situation, superiority is only an edge.
Mastery, therefore, information dominance, is the requirement to enable winning quickly, decisively and with minimum casualties as dictated by the National Military Strategy. Dominance is control oriented. Superiority is rank oriented. Dominance is dynamic in nature. Superiority is static in nature.