Valenzuela, Philippines is 7.4% larger than Manila.
Area: 42 km2 calculated
Manila is the capital and second largest city of the Philippines. It is one of the sixteen cities which, along with the municipality of Pateros, make up Metro Manila, the National Capital Region, whose overall population is around 12 million. 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