What is advantage of KRE

Trying to understand what is the advantage of using KRE? At present we can generate command out of katalon 6.3.3 and use that in our azure virtual agents to execute the tests.

  1. What extra does KRE adds here?
  2. If we use KRE, do I still need to install the Katalon Studio in the agents?

Members please help me in understanding the advantage here.