A MOCA is classified as a minimum IFR altitude. It will keep you 1000' above the highest obstacle in non-mountainous terrain and 2000' above the highest obstacle in mountainous terrain. Moutainous terrain is defined as a 3000' change in elevation within a 10 mile distance.

A MORA is a JEPPESEN derived (non-official) altitude. "Route MORA values clear all reference points by 1000' in areas where the highest reference points are 5000' MSL or lower. Route MORA values clear all reference points by 2000' in areas where the highest referene points are 5001' feet MSL or higher." (Jepp Intro page 10)