Saint Paul, Minnesota is 25 times larger than San Juan, Metro Manila.
Area: 145 km2 calculated
Saint Paul is the capital and second-most populous city of the state of Minnesota. As of 2013, the city's estimated population was 294,873. Saint Paul is the county seat of Ramsey County, the smallest and most densely populated county in Minnesota. Wikipedia
Area: 6 km2 calculated
San Juan is a city in the Philippines. It is one of the cities that comprises Metro Manila, the National Capital Region of the Philippines. It is the smallest city in the country in terms of land area. Wikipedia