Brooklyn (NYC borough) is 87% larger than Rochester, New York.
Area: 180 km2 calculated
Brooklyn is the most populous of New York City's five boroughs, with about 2.6 million people, as well as the second-largest in area. Wikipedia
Area: 96 km2 calculated
Rochester is a city in Monroe County, New York, south of Lake Ontario in the United States. Known as the World's Image Center, it was also once known as the Flour City, and more recently as The Flower City, annually hosting the Lilac Festival. It is the county seat for Monroe County. Wikipedia