Which two ways were the Mauryan and Gupta dynasties similar?

The Mauryan and Gupta dynasties are similar in the following two ways:

• Significant scientific discoveries were made during the time of both the dynasties
• Both the Mauryan and Gupta empire geographically covered most of the Indian subcontinent

For further reading check the following articles:

• Mauryan Empire
• The decline of the Mauryan Empire
• Emperor Ashoka
• Gupta Empire