While both are vibrant, multicultural metropolises, New York City significantly outstrips Toronto in both population and geographic scale.
NYC's population exceeds Toronto's by more than three times.
New York is roughly 24% larger physically.
The gap widens at the metro level: NYC metro ~20 million vs. Toronto metro ~6.4 million (Greater Toronto Area).
Toronto is Canada's undisputed financial, cultural, and population center—a "primate city" dominating its national urban hierarchy. New York shares the US stage with Los Angeles, Chicago, and other major centers but operates at a global scale few cities match.
Both offer world-class diversity, arts, dining, and transit—but New York does so at a magnitude that places it in a different tier globally.