How do embryonic stem cells differ from other stem cells?!

Embryonic stem cells (aka pluripotent stem cells) are the most basic kind of cell, and have the potential to become any other type of cell in the body. Stem cells that are derived from other tissues (most commonly the skin) are not pluripotent, and have a more limited range of what they can become, and therefore less potentially useful.

As has been said embryonic stem cells can derive into any type of specialized cell, and known as totipotent, and alone can develop fully into a complete organism. The inner cells of an embryo are pluripotent, which means they can develop into any type of cell but they cannot develop into a complete organism alone. Multipotent cells can be found in adults in areas such as bone marrow, such as hematopoietic, or blood forming stem cells. They can differentiate into all different kinds of blood cells but not into other kinds of cells. There are different kinds of these adult stem cells which have limited differentiation abilities.

http://stemcells.nih.gov/info/basics/bas…

embryonic stem cells hasn't developed into what it needs to be yet, so it can switch to anything. Adult stem cells cannot.