Final answer:
The Egyptian pyramids, like the Great Pyramids at Giza, have smooth sides and are made of massive stone blocks, while the pyramid at Saqqara, known as the Step Pyramid of Djoser, has a stepped design and is made of smaller stone blocks.
Step-by-step explanation:
The main difference between the Egyptian pyramids and the pyramid at Saqqara is the design and construction. The Egyptian pyramids, such as the Great Pyramids at Giza, have smooth sides and are made of massive stone blocks. On the other hand, the pyramid at Saqqara, also known as the Step Pyramid of Djoser, has a unique stepped design and is made of smaller stone blocks. This step pyramid was the first of its kind and served as a prototype for future pyramid constructions.