Zifeng Tower vs First Canadian Place

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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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First Canadian Place (originally First Bank Building) is a skyscraper in the Financial District of Toronto, Ontario, in the northwest corner of King and Bay streets, and serves as the global operational headquarters of the Bank of Montreal.

At 298 m (978 ft), it is Canada's tallest skyscraper and the 15th tallest building in North America to structural top (spires) and 9th highest to the roof top, and the 105th tallest in the world. It's the third tallest freestanding construction in Canada, after the CN Tower (also in Toronto) and the Inco Superstack chimney in Sudbury, Ontario. The building is owned by Brookfield Office Properties, setting it in co-ownership with the neighbouring Exchange Tower and Bay Adelaide Centre as well as various other office areas across Downtown Toronto.

Source: Wikipedia