Questions about example sentences with, and the definition and usage of "Comprised"

A: They are almost the same.

Composed usually means ingredients or materials.
“The paper bag is composed of recycled tree bark.”

Comprised usually includes ideas and more vague things.
“The proposal is composed of a research report, a market survey, and other methods of research”

A: No difference. But careful between consist of and consists of.

Examples:
The United Kingdom is comprised of England, Wales, Scotland and Northern Ireland.
The United Kingdom consists of England, Wales, Scotland and Northern Ireland.

In the above United Kingdom is singular >>>> consists

The shirts consist of cotton, polyester and elastane.
The teams consist of both men and women.

Shirts/teams are plural >>>>> consist