Comparaison made on municipality size is flawed in general, because the boundaries of a specific jurisdiction depends on political circumstances, not on urban growth. Take San Francisco: it has only 800k inhabitants for 8M in the Bay Area, 10%. Whereas San Antonio TX has 1.4M. Is it bigger? Well, San Antonio metro has only 2.3M. What matters is the size of the metro area, because metro areas are a measure of job markets, not political contingencies.