Scottsdale, Arizona is 8 times larger than Pasadena, California.
Area: 60 km2 calculated
Pasadena is a city in Los Angeles County, California, United States. As of 2010 United States Census, the population of Pasadena was 137,122, making it the 180th-largest city in the United States, down from 168th place in 2009. Pasadena is the ninth-largest city in Los Angeles County. Wikipedia
Area: 478 km2 calculated
Scottsdale is a city in the eastern part of Maricopa County, Arizona, adjacent to the Greater Phoenix Area. According to the U.S. Census Bureau, as of 2010 the population of the city was 217,385. Wikipedia