Is polyester covered cotton the same as polyester/cotton blend?

Not the same thing at all.

First of all, let's talk about polyester-cotton blend, which is a kind of fabric obtained by spinning a mixture of polyester fibers (polyester) and cotton yarns, and then taking them to weaving. The polyester and cotton yarns are evenly mixed in the yarn and in the fabric. Polyester and cotton blended yarns can be woven into various sizes of fabrics such as plain, twill and so on.

Then say polyester cover cotton, this is a kind of polyester silk and cotton yarn for mixed knitting fabric, not the general fabric kind of woven fabric, first of all, it is knitted. Secondly, it is not a mixture of the two, but a mixture of knitting, knitted fabric, polyester yarn covered in cotton yarn outside, made of clothes, cotton yarn close to the body, polyester outside. In this way, not only can make good use of cotton yarn's natural fiber moisture absorption and comfortable characteristics, but also can make use of polyester's appearance of the advantages of straight.