Corpus Christi, Texas is 3.6 times larger than McAllen, Texas.
Area: 443 km2 calculated
Corpus Christi is a coastal city in the South Texas region of the U.S. state of Texas. The county seat of Nueces County, it also extends into Aransas, Kleberg, and San Patricio counties. The metropolitan area US Census estimated population in 2013, was 442,600. Wikipedia
Area: 125 km2 calculated
McAllen is the twenty-second most populous city in Texas and the largest city in Hidalgo County, Texas. It is located at the southern tip of Texas in the Rio Grande Valley, and is part of the Southern United States. Wikipedia