Scottsdale, Arizona is 4.3 times larger than Eugene, Oregon.
Area: 112 km2 calculated
Eugene is a major city of the Pacific Northwest located in the State of Oregon. It is the third-largest city in the state and the county seat of Lane 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