Where? In the US its the president. In Italy Im not sure. They take the pope very seriously there. In the Us at least the pope only has power over the catholic church whearas the pres has power over the nation.
One has more power over earthly things the other over eternal things. One has more power over death, the other has the path to eternal life. One is the leader of the US, the other is the leader of Catholics world wide. One often lies to push his political agenda, the other speaks truth to spread God's Word.