New York and Los Angeles — two world-class burgs, divided by thousands of miles of flyover country, disagreeing on almost everything. How should cities be built, for example? Do they belong to pedestrians, or to cars? And what’s “cold weather” — should we break out the shorts when it goes above freezing, or start shivering when the mercury plummets to a chilling 59? And who, more importantly, has the better pastrami?