NA Hell has everything, from stupidity to malice to the most unpleasant of all the doomed souls.
European Hell has plagues, snooty people, and is making reservations for the Queen of England.
SA Hell is pretty much an enigma, thus while their northern neighbors has all the kitty litter, they're just chilling out.
West and East Asia are basically bros, with some of the smartest and brutal people from throughout human history going to their Hell. That and they are able to handle more than 2/7ths of the world's population in their hell.
African Hell, despite being fairly cramped and hot, is also the most "natural" of all the Hells, in part due to humanity's existence starting in Africa. Thus, it's relatively close to being like Africa.
Australian Hell is actually Super Hell, since normal Australians wouldn't find any other Hell, even North American Hell, to being intense enough for them.
Antartica Hell is just a newborn.

Ah yes, everyone knows the continent in between Europe and Asia.