How were the Olmec and Aztec civilization different?

The Olmec civilization, which thrived from around 1200 to 400 BCE, is often considered the "mother culture" of Mesoamerica and is known for its colossal stone heads and early writing systems. In contrast, the Aztec civilization emerged much later, around the 14th century CE, and was characterized by a highly organized society, vast empire, and significant advancements in agriculture and trade. While the Olmecs laid foundational cultural and artistic influences, the Aztecs were known for their militaristic expansion and complex religious practices, including human sacrifice. Additionally, the Aztecs built large urban centers like Tenochtitlan, showcasing a different level of architectural and societal development.