<Tr> <Td> Mexico </Td> <Td> Mexico City </Td> <Td> 8,864,000 </Td> <Td> 22,300,000 </Td> </Tr> <Tr> <Td> Brazil </Td> <Td> São Paulo </Td> <Td> 12,038,175 </Td> <Td> 21,742, 939 </Td> </Tr> <Tr> <Td> United States </Td> <Td> New York City </Td> <Td> 8,405,837 </Td> <Td> 19,949,502 </Td> </Tr> <Tr> <Td> Argentina </Td> <Td> Buenos Aires </Td> <Td> 2,776,138 </Td> <Td> 15,024,000 </Td> </Tr>

What are the differences between north and south america