The only minor difference is about 80 years of economic activity; and a few super secret military projects, including one that helped launch the atomic age.

Also the two cities both have modern engineering marvels in their own right. Just one had a really tall building that served as a symbol of power, but with no real purpose. The other has a massive dam that took amazing diplomacy and bureaucracy to convince 7 states and Mexico to agree to tame a wild and destructive river; in exchange for generating power, and using the revenue to fund itself.