Zifeng Tower vs Arraya Tower

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Zifeng Tower (Greenland Center-Zifeng Tower or Greenland Square Zifeng Tower, previously Nanjing Greenland Financial Center) is a 450-meter (1,480 feet ) supertall skyscraper (special class of skyscraper) in Nanjing, Jiangsu. The 89-story building finished in 2010 includes office and retail space up to floor 41. Floors 49-71 feature a hotel, a lot of restaurants, and a public observatory on the 72 floor. The tower's stepping is practical, helping to separate those sections.

The building is currently the tallest in Nanjing and Jiangsu province, the eleventh tallest in China and the twentieth tallest on earth. Architectural firm Skidmore, Owings and Merrill designed the building, headed by Adrian Smith. The Tower occupies an area of 18,721 square meters. The Nanjing Greenland InterContinental Hotel is located within the tower.

Source: Wikipedia

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The Arraya Tower is a skyscraper completed in 2009 in Kuwait City, Kuwait.

The tower serves as a grade-A office construction. With sixty storeys, and 300 metres high (using a 45-metre spire), the building was the tallest tower in Kuwait until the construction of Al Hamra Tower in 2011. On January 19, 2010, The Council on Tall Buildings and Urban Habitat (CTBUH) announced that Arraya Tower was the 4th-tallest building completed in 2009. Curtis W. Fentress, FAIA, RIBA, of Fentress Architects, was the primary architect of the building, and Ahmadiah Construction was the primary contractor. The tower complements the Present 130-metre-high Arraya Tower housing offices and the Courtyard by Marriott hotel, as well as the upscale Arraya Shopping Mall and the Arraya Ballroom. Building on the tower began in February 2005, with occupation scheduled for February 2009. As of August 22, 2008, the tower was topped out and the superstructure was complete. Exterior cladding, consisting of white marble, green glass and steel rods, was largely complete. Interior works were well underway and wrapped up in early 2009 in time for the tower's opening.

Source: Wikipedia