Here are the differences between the yaki and silky hair. Please check below
Yaki is a texture that is manufactured from silky hair to resemble afro texture hair.
Silky hair is is the natural state of the hair as it comes from the donor. which is unsuitable if you want a style that resembles more accurately natural afro hair.
The yaki hair texture is created by taking this soft and silky straight hair and adding a micro kink texture to resemble African hair types.
If you want a heavier texture that resembles hair that has not been chemically pressed but has been natural blown dried or lightly pressed you should choose a Kinky Straight this texture looks and feels fluffier.