London is bigger in land area, New York is bigger in density and metro population. But both are enormous in the ways that matter: culture, chaos, and the number of times you’ll accidentally bump into someone and apologize in two different accents.
So next time someone asks you which city is bigger, smile and say, “Both are big enough to make you feel very small—and very lucky.” Then order another round. Cheers or bottoms up—your choice.