Final answer:
New Amsterdam and Philadelphia were both important port cities that attracted immigrants and had connections to the slave trade.
Step-by-step explanation:
New Amsterdam and Philadelphia had several things in common.
1. Both were important port cities: Both Philadelphia and New Amsterdam were located on major rivers and served as significant ports for trade and commerce.
2. Both attracted immigrants: Both cities attracted immigrants from various parts of Europe, who came seeking economic opportunities and a better life.
3. Both had connections to the slave trade: Quaker merchants in Philadelphia participated in the African slave trade, while New Amsterdam had enslaved Africans who were forced to build fortifications.
Overall, both cities played important roles in the growth and development of the colonies and shared some similarities in terms of their economic activities and demographics.