What historical orbital trait distinguishes Kuiper Belt Objects from Oort Cloud inhabitants?

Kuiper Belt Objects remained close to their original orbits

The defining difference between Kuiper Belt Objects (KBOs) and Oort Cloud objects lies in their formation history and resultant orbital characteristics. KBOs are generally considered the leftovers from the formation of the outer giant planets (Jupiter, Saturn, Uranus, Neptune), and they have remained relatively close to their original formation locations, residing mostly within a flat disk beyond Neptune. In contrast, Oort Cloud objects are interstellar refugees that were ejected inward by the massive young planets and flung into highly eccentric, high-inclination orbits far outside the ecliptic plane, resulting in their extreme isolation and preservation.