Scottsdale, Arizona is 4.8 times larger than Carlsbad, California.
Area: 100 km2 calculated
Carlsbad is an affluent seaside resort city occupying a 7-mile stretch of Pacific coastline in North San Diego County, California. The city is located 87 miles south of Los Angeles and 35 miles north of downtown San Diego. 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