If diversity just a euphemism for "non-white", then NYC is as diverse as Atlanta - both with about 40% white population and 60% non-white. NYC is far more diverse than America as a whole - 30% fewer whites, 2x more blacks, and 80% more Latinos, 3x more Asians, and 10x more Jews than one would expect from America's overall demographics.
In fact, by most measures NYC is more diverse than Atlanta. Atlanta is for the most part whites+blacks, whereas NY has an actual latino and asian population.
In fact, by most measures NYC is more diverse than Atlanta. Atlanta is for the most part whites+blacks, whereas NY has an actual latino and asian population.