The difference (www.rzuser.uni-heidelberg.de) pictue citaion http://www.pbs.org/wgbh/aia/part1/1i3018.html
In Africa, slaves were treated almost exactly like the normal people in Africa, with the exception of the rule that the slaves couldn't leave whatever place they were at without their owner; however, in America, the slaves were treated like animals. At auctions they were looked over like livestock and forced to have their names changed. In light of all the differences between both systems they did have one thing in common. No slaves were ever really free unill slavery became illegal. Although both were horrible violations of human rights, the difference between slavery in Africa and America was enormous.