Inco Superstack vs One57A1

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The Inco Superstack in Sudbury, Ontario, with a height of 381 metres (1,250 ft), is the tallest chimney in Canada and the Western hemisphere, and the 2nd tallest freestanding chimney in the world after the GRES-2 Power Station in Kazakhstan. It's also the second tallest freestanding structure of any kind in Canada, behind the CN Tower but forward of First Canadian Place. It's the 40th tallest freestanding structure in the world. The Superstack is situated on top of the biggest nickel smelting operation in the world at Vale's Copper Cliff processing centre in the city of Greater Sudbury.

In 2018, Vale declared that the stack will be decommissioned and dismantled beginning in 2020. On July 28, 2020, Vale declared that the stack had been officially taken out of service, but would remain operational in standby mode for two more months as a backup in case of a malfunction in the new system, after which the dismantling of this Superstack will begin. In addition to further reducing sulfur dioxide emissions by 85 percent, the decommissioning of the pile is expected to cut the complex's natural gas consumption in half.

Source: Wikipedia

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One57, formerly known as Carnegie 57, is a 75-story, 1,005-foot (306 m) supertall skyscraper in 157 West 57th Street between Sixth and Seventh Avenues in the Midtown neighborhood of Manhattan, New York City. The construction has 92 condominium units in addition to a new Park Hyatt Hotel with 210 rooms, the flagship Hyatt property.The tower, developed by Extell Development Company and designed by Christian de Portzamparc, was the first ultra-luxury condominium tower along the stretch of 57th Street which was then named Billionaires' Row. Upon completion in 2014, it was the tallest residential building in the city for a month or two until the completion of 432 Park Avenue.

Source: Wikipedia