Arctic & Antarctic … both are fascinating worlds!
It’s not a contest: the South Pole is much colder than the North Pole. The explanation is a matter of geography. The North Pole is located in an ocean (mostly) surrounded by land and the South Pole is located in a continent surrounded by ocean. The North Pole is located a few feet above sea level. The elevation varies because the thickness of ice covering the ocean at the North Pole changes during course of the year. The South Pole sits at an elevation of 9,301 feet and, in general, the higher one goes, the colder it gets.
Average temperatures: 32 degrees F in the summer and -40 degrees F in the winter at the North Pole; -18 degrees F in the summer and -76 degrees F in the winter at the South Pole.
More at: https://wgntv.com/weather/weather-blog/which-is-colder-the-north-pole-or-the-south-pole/
and at: https://www.scientificamerican.com/article/why-is-the-south-pole-col/