What is the difference between a ziggurat and a step pyramid?

A ziggurat is a massive structure built in ancient Mesopotamia, characterized by a rectangular, terraced design and often serving as a temple platform. In contrast, a step pyramid, such as those found in ancient Egypt, features a series of stacked, flat platforms that create a stepped appearance, often serving as a tomb. While both structures have a tiered design, ziggurats are more closely associated with religious practices and rituals, whereas step pyramids are primarily linked to funerary architecture. Additionally, ziggurats typically have a more complex layout with multiple levels and ramps leading to a shrine at the top.