Slavery was very different in sugar growing vs. non-sugar growing regions.
Sugar growing regions (Caribbean, Brazil, some parts of Louisiana) have climates that make malaria, yellow fever, and other nasty tropical diseases endemic.
Neither white nor black populations were sustainable in these regions. Death rates exceed birth rates. Whites typically came, worked a few years and made their fortunes, then returned to their home countries if they didn't die. To maintain the slave labor force, continual importation of new slaves was required. Despite the small geographic areas involved, about 85% of slaves were shipped to these areas. The US, having few sugar growing regions, only took in about 10% of overall slave imports.
This is why Afro-Syncretic (voodoo, santeria, candomble) religions are strongest in the areas of former sugar cultivation -- there were always a good amount of newly arrived Africans to keep African traditions alive. Africans generally outnumbered whites by a large margin, making slave revolts feasible.
In non-sugar growing regions, the climate was healthier. Both white and black populations experienced birth rates substantially above death rates. The ratio of whites to blacks in the South was pretty constant at 2 whites per 1 black. Slave revolts were never a feasible liberation strategy. Because most slaves had been separated from Africa for many generations, the links to African religions were much weaker.