Cupro is a high-quality natural product with a silky touch: a cellulose fiber produced by treating cotton cellulose with cuprammonium salt. It is best known as an alternative to silk, and is often called artificial silk or artificial silk. Cupro is often a very fine tissue, light weight, also known under the name Bemberg.
Simply put, both fabrics are luxurious viscose qualities with a better appearance than 'normal viscose': they wrinkle less and have a finer gloss. You can also wash them yourself.