What are differences and similarities between the feudal pyramiding and the roman catholic church pyramid

The difference is that the catholic church pyramid is more complex, having seven levels, from bottom to up: the laity, deacons, priests, bishops, archbishops, cardinals, and the pope.

The feudal pyramid is simpler, having three levels or estates: the nobles, the clergy, and the commoners. Some authors add a fourth level: the knights, which are above the commoners but below the clergy. However, the knights themselves were nobles, and even if many of them were low-level nobles, they can be still considered to be under the nobles estate.

The similarity is that both are hierarchical: social structures with a clear-cut separation of castes or classes of people, each level being subordinate to the one above and subordinating the one below.