Choose NYC for: dense walkable city, Broadway, world-class museums, distinct seasons, public transit (subway), 24/7 energy, diverse neighborhoods. Choose LA for: beaches, year-round sunshine, Hollywood, palm trees, outdoor lifestyle, themed parks (Disneyland, Universal), Pacific sunsets. Cost: similar — both expensive but NYC slightly pricier for hotels, LA pricier for car rental (essential there). Food: NYC for pizza/bagels/deli, LA for Mexican and fusion. Weather: NYC has 4 seasons (great fall, brutal winter, hot summer), LA is mild year-round but has summer 'June Gloom'. Distance from each other: 5.5 hr flight or 40+ hr drive. Many visitors do both in one trip.