What building was built earlier,  Manhattan Life Insurance Building or 15 Penn Plaza?
15 Penn Plaza 15 Penn Plaza, also known as the Vornado Tower, is a proposed 68-story tower in the Midtown Manhattan section of New York City planned by Vornado Realty Trust. It would have 430 units and 2,050,000 square feet (190,451 m²) of floor space. The Hiller Group is the designer. Despite only having 68 floors, it would be just 10 m shorter than the Empire State Building, which has 102 floors.
15 Hudson Yards 15 Hudson Yards is a residential building currently under construction on Manhattan's West Side. Located in Chelsea near Hell's Kitchen Penn Station area, the building is a part of the Hudson Yards project, a plan to redevelop the Metropolitan Transportation Authority's West Side Yards. The tower started construction on December 4, 2014.