One way in which the reigns of Peter the Great
and Catherine the Great are similar is that both
leaders
(1) promoted the emancipation of serfs
(2) strengthened the role of the Duma and
centralized royal power
(3) shared their power with the Russian
Orthodox Church
(4) pursued a policy of westernization and
expansion
One way in which the reigns of Peter the Great and Catherine the Great are similar is that both leaders "(4) pursued a policy of westernization and expansion," especially Peter.