EASY TO UNDERSTAND DIFFERENCES  BETWEEN ROMAN CATHOLIC ORIGINS AND EASTERN ORTHADOX ORIGINS

So both churches are officially “Catholic”, meaning “universal” churches. Orthodox means literally “right/straight/correct faith”. The two churches were not separate until 1054, so both can claim descent from the original apostles. So the answer is neither is older than the other.

The two were once one so originally there was no separation, and originally it was just the “Christian Church.” The Orthodox church is considered the original church now because they follow more of the old traditions than Roman Catholics do; more changes happened in the Catholic church after the east west schism than