How were Aztec pyramids similar to Egyptian pyramids, and how were they different?

The Aztec pyramids were built to house altars.

Top: flat, to serve as a base for the placement of the altar External aspect: stairs and sculptures embedded in the walls. Coating of unpolished stones Access: By steps to reach the top of the pyramid, where were the altars Base: Square or Rectangular

The Egyptian pyramids served as tombs for the pharaohs.

Top: Well defined summits External aspect: smooth walls, no stairs or objects on the walls. Polished Granite Block Flooring Access: through corridors and intermediate chambers to reach the interior of the building, where is the tomb Base: square