Comparison:-Both the people living in the equator and the polar people are mainly uncivilized- they build primitive shelters from raw materials available around them.They are mostly non-vegetarians(though not all primitives living at the equator), or it can be said, that they are hunter-gatherers. 
Contrast:-The equatorial people mainly live in forests, but the polar people live in bare lands.The latter build igloos, but the former build primitive huts, and also some, who are included in the former's group, live and sleep under the open sky.

Examples :1.Polar people-Athabascans, Inuits, Yu'pik
                   2.Equatorial People-Pygmies, Bushmen, Xhosas, Bantu