The only difference is melanin content which is irrelevant. There are no others.
The answer lies between the physical structure of the hair. One is Heredity. These are genes that each person inherits from their parents. It's not only a difference between just African Americans and Caucasians, hair is different with all races such as African Americans, Caucasians and Asians. We all have a different diameter of pigment and structure with our hair which will vary.
No. She was born in Connecticut to Caucasian parents, so she is Caucasian.
No, she is caucasian.
No, she is not black. She is caucasian(white).
No, Madonna is Caucasian.
No. He is Caucasian.
No, she is caucasian.
Differences between Caucasian & AsianIn reality, the two are mostly similar in skin color. The most outstanding features would be the hair colour. Caucasians being blonde to dark brown with a higher possibility of curls and waves whilst Asians would typically have auburn to jet black hair that is usually straight. Another difference is that Caucasians have relatively more prominent brow ridges and jaw lines. Caucasians have a pointer nose than asians.
Caucasian
by looking at the skin
Theyr sken
they are both black