The short answer: Chelsea for a structured west-side route, the Village for street-level wandering
Chelsea and Greenwich Village sit next to each other, but they reward different styles of day. Chelsea is easy to organize around anchors: galleries, the High Line, Chelsea Market and the Hudson side. Greenwich Village is less about following one attraction corridor and more about moving through streets, squares, restaurants and cultural landmarks.
Art: Chelsea has the clearer advantage
West Chelsea became one of New York's major gallery districts, and an art-focused afternoon can move between exhibition spaces with relatively little backtracking. That concentration is the reason to choose Chelsea when galleries are the actual purpose of the trip. Greenwich Village has cultural institutions and galleries of its own, but contemporary gallery-hopping is not as dominant a neighborhood use case.
Walking character: the Village feels less like the Manhattan grid
Greenwich Village's street pattern preserves older routes and irregular blocks that contrast with the numbered grid farther north. Washington Square Park provides an obvious center, but much of the appeal comes from the streets connecting it to the West Village and surrounding areas. Chelsea's grid is easier to navigate and better when you want a predictable north-south or east-west progression.
Parks: choose the kind of public space you want
The High Line gives Chelsea an elevated linear walk with views over streets, buildings and the west side. Washington Square Park gives Greenwich Village a civic square where the destination is the public space itself and the streets radiating from it. They are not interchangeable park experiences, so this criterion should follow your preferred kind of walk.
Nightlife and music: Greenwich Village is the stronger fit
The Village has deep associations with jazz, folk music, clubs and late-evening street life. A plan that begins with dinner and continues to a performance or bar can remain geographically compact. Chelsea can support an evening, but its strongest visitor identity is less dependent on one continuous nightlife ecosystem.
Food: neither neighborhood needs a universal winner
Chelsea Market makes Chelsea particularly easy for a flexible food stop during sightseeing, while both neighborhoods contain restaurants suited to longer meals. Greenwich Village works especially well when dinner is part of an evening walk. Choose the specific meal and route instead of assuming one neighborhood's restaurant scene can be reduced to a score.
For a first-time Manhattan day
If your list includes the High Line or a serious gallery block, build the day around Chelsea. If Washington Square, jazz, historic streets or a less structured downtown walk matter more, choose Greenwich Village. Because the neighborhoods are adjacent, a strong itinerary can also move south from Chelsea into the Village rather than crossing Manhattan for an unrelated second stop.
Transit and route logic
Both areas connect well to the subway network, but stations sit on different edges and lines. The useful question is where you are going afterward. Chelsea aligns naturally with west-side destinations north and south; the Village connects easily into SoHo, the East Village and other downtown neighborhoods. Check the actual station near your final stop rather than treating the neighborhood label as a transit guarantee.