Reply To: OU = MO? Home › Forums › Controversial Topics › OU = MO? › Reply To: OU = MO? April 1, 2015 2:39 pm at 2:39 pm #1070715 simcha613Participant simcha613- not to mention that what Sam says is correct. There isn’t that much of a difference between the frum Modern Orthodox and the Yeshivish.