what is differences between two xpaths?

These xpaths are about the rapid course in Academy; Crash Course. But I couldn't figure out differences between two xpaths and each result of these codes. 1) [UserManager.Employee_Department /UserManager.Department /UserManager.Employee_Department_Security /UserManager.Employee /UserManager.Employee_Account='[%CurrentUser%]'] 2) [UserManager.Employee_Department_Security /UserManager.Department /UserManager.Employee_Department /UserManager.Employee /UserManager.Employee_Account='[%CurrentUser%]'] you can see the domain model below;