Everybody in New York has an opinion about what makes Yankees fans different from Mets fans. So do we. The only difference is that we've got 445 pages of data to back it up.

To better understand the personal lives and psyches of New York sports fans, The Wall Street Journal tapped the polling firm Public Opinion Strategies to conduct a survey of 650 male and female fans across all five boroughs. In the coming weeks, we'll share the results in an occasional series we're calling The Grand Fanalysis.

Today's installment will attempt to answer one of the city's most hotly debated sports questions: What really separates men who root for the Yankees from men who prefer the Mets?

Unsurprisingly, the Yankees are more popular: Sixty percent of the survey's baseball fans said they followed the Bronx Bombers, compared to just 33% who favored the Mets.

The Mets have more fans in Queens, of course, and the Yankees have an edge in the Bronx, but Manhattan is dead even at 19% each.