Despite the Thames conveniently cutting a clear (if squiggly) line through the city, and thereby bisecting it into rivalrous Northern and Southern halves, it's pretty clear to any Londoner that the true intra-city throw-down is actually between East and West. And when it comes to throw-downs, there's one measure of success that trumps all others: which has the better food?
Lacking a handy waterway to divide up the camps, we've disqualified Soho & Covent Garden outright, and we tried not to take any group spot into account (no MEATliquor, Polpo, Burger & Lobster, Hawksmoor, etc.). West = Mayfair and farther. East = Farringdon and on.