No, objects at different elevations do not experience a significant difference in gravitational force solely due to their vertical position. The force of gravity depends on the mass of the objects involved and the distance between them, but it is largely independent of elevation or height above the Earth's surface.
The force of gravity is primarily determined by the mass of the celestial bodies involved, such as the Earth and other celestial objects like the Moon or Sun. Near the surface of the Earth, the gravitational force is relatively constant. This means that regardless of whether an object is at sea level or at a higher elevation, the gravitational force it experiences will be essentially the same.
However, it's worth noting that the strength of gravity does vary slightly with changes in elevation due to the shape of the Earth. The Earth is not a perfect sphere, but rather an oblate spheroid with variations in its gravitational field. These variations can cause slight differences in gravitational acceleration at different locations on the Earth's surface. Still, these variations are generally minimal and do not have a significant impact on everyday observations or experiences.