Moreno Valley, California is 3 times larger than Valenzuela, Philippines.
Area: 133 km2 calculated
Moreno Valley is a city located in Riverside County, California and is part of the San Bernardino-Riverside Metropolitan Area; the city is 19 miles south of downtown San Bernardino, while Riverside lies directly to the west. Wikipedia
Area: 45 km2 calculated
Valenzuela, officially known as the City of Valenzuela or simply Valenzuela City, is the 119th largest city of the Philippines and one of the 16 cities plus a municipality that compose the region of Metro Manila, located about 14 km north of Manila. Wikipedia