Compare Harappa and Mesopotamia.

The Harappan or Indus Valley Civilization spanned the northwest region of South Asia and lasted for the better part of 2000 years from around 3300 BC to 1300 BC. Along with Mesopotamia and ancient Egypt, it formed one of the three earliest known civilizations. Though extensive trade routes developed between Harappa and Mesopotamia, there were a number of differences between the two civilizations. For one thing, Mesopotamia was relatively rich in precious metals. Harappa wasn't, which is why it had to import a lot of its metals from Mesopotamia and elsewhere. Indeed, it was the trade in precious metals that was the main driver of commerce between the two civilizations.
Yet in other respects, the Harappans were considerably more advanced than Mesopotamia. They developed a sophisticated system of weights and measures, one of the first uniform systems to be established anywhere. They were also well advanced in the measurement of time. Harrapan civilization was renowned for its writing system, which was based on a complex symbolic script. The Mesopotamians, by contrast, used a more prime cuneiform system of writing, carving crude, wedge-shaped marks into clay tablets using a stylus.