Refined grains have mostly the endosperm; they are missing bran and germ. Are whole grains healthier than refined grains? Yes! See articles in this section: Whole Grains vs Refined Grains.

How does Bureau of Indian Standards defines sooji / rawa? Excerpt from Indian Standard Specification for Suji or Rava (Semolina) (1968) explains how semolina / sooji / rawa has bran and germ removed to varying degrees.

A good article that explains sooji vs rava: What Is The Difference Between Suji And Rava? Find Out. An informative video that explains sooji vs semolina: