What's the difference between regular Human Hair Extensions and Yaki Human Hair Extensions?

Yaki is a texture that is used by black women. It is the same texture as chemically relaxed Black/African hair. I use it for sew-in weaves. I can't use regular/European straight hair extensions because it doesn't match my texture.What's the difference between regular Human Hair Extensions and Yaki Human Hair Extensions?
yaki has a more cousre feel and texture to it you want silky 100% human hair that's what i get i hate yaki it gets matted