When we compare gonkan and regular posts, taking the example of Dainagon (chief council of state) and Gon Dainagon (provisional chief council of state), there were cases where both had the same authority as well as cases where one had authority while the other was a nominal post.
権官と正規の官のあいだで、例えば、大納言と権大納言を較べると、両者ともに同格の権力を有した場合と、一方は実力を持つが、他方は名前だけの官職であった例などがある。