Head to head: the practical comparison
Height
One World Observatory wins on altitude by around 400 feet. But higher isn’t automatically better. From Top of the Rock you’re inside the skyline, level with the tops of neighboring towers; from One World you’re looking down on it.
Sunset
Both decks are superb at sunset, and sunset time slots are usually the first to sell out. At Top of the Rock, the sun drops toward the Hudson while the Empire State Building lights up to the south. At One World, the sunset spreads across the harbor and New Jersey, with the Statue of Liberty in silhouette. New York sunsets range from around 4:30 p.m. in December to after 8:30 p.m. in late June, so check the time for your date and aim to arrive 45 minutes to an hour early to see daylight, golden hour and city lights in a single visit.
Crowds and comfort
Both use timed-entry tickets, and both are busiest on weekend afternoons and at sunset. Early mornings are calmest at either. Top of the Rock’s open-air deck can be windy and cold in winter, so dress for it. One World is fully indoors, which makes it a strong choice on a chilly or drizzly day, although low cloud can hide the view entirely at that height; check the forecast on the morning of your visit.
Getting there
Top of the Rock is in Midtown between Fifth and Sixth Avenues, steps from the B, D, F and M trains at 47th–50th Streets–Rockefeller Center. One World Observatory is in Lower Manhattan, next to the World Trade Center transit hub and the Oculus, served by numerous subway lines and PATH trains.