Answer:

There is no distinction between "species" in Biography. However, due to the different materials of writing, seal cutting and Jin Ming, the different needs of composition and layout, and the different styles and schools, each word can be changed, such as "Da":

This book is a relatively standard seal script, but it is also because of the need of composition and style, and some places are slightly beautified, which is allowed by seal script.

The words "Peking University Library Collects and seals" and the seal script of Shuowen Jiezi is as follows: