There is no difference between the two.

Africans i.e. belong to the Negro (i.e. black race). Africans generally refer to the Negro population of sub-Saharan Africa, and their languages are divided into four families: Khoisan, Niger-Congo, Bantu and Nilo-Saharan. Since the inhabitants of sub-Saharan Africa are mostly dark-skinned, Africans are often used to refer to black people. Sometimes Africans include Arabs in North Africa and Caucasians in South Africa.

The black race is the black race, also known as the Negro race, the Negro-Australian race, the equatorial race, is based on the physical heritable traits and the division of the population, the human classification in a kind of theory. Negroes generally have a dark complexion, dark wavy or curly hair, dark eyes, a broad, flat nose with a low or medium root, small nasal prominence, large horizontal diameter of the nostrils, convex lips, a large mouth width, thick lips, and less beard and body hair.

Expanded profile:

Division of the Negro caste:

The Negro race is further comprised of two major ethnic groups: the Sudanese and the Bantu. The distribution of the two in Africa is roughly bounded by the equator. The Sudanese live north of the equator, characterized by pure black skin color; Bantu live south of the equator, characterized by light black skin color.

For example, the black leader of South Africa, Nelson Mandela, is more familiar to everyone, and his skin color is not very black, because the black people of South Africa belong to the Bantu ethnic group. In addition, there are two more specific ethnic groups: Pygmies and Bushmen, although usually categorized as Bantu, but more different from other blacks.

The main racial classifications of blacks are the Sudanese Negroes, the Bantu Negroes (both of which make up the majority of the black African population), the Khoisan Negroes, the Cushitic Negroes (who are of a mulatto race), and the Australian Aborigines. During the medieval period and before the Middle Ages, they were mainly found in sub-Saharan Africa. Later, because of the imperialism and mercantilism of European countries, large numbers of blacks were forced to be sent as slaves to South and North America.

Baidu Encyclopedia-Africans (inhabitants of sub-Saharan Africa of the Negroid race)

Baidu Encyclopedia-Black People