Although they are different, both show a desire to simplify or escape from our complicated world. Earthwork artists, such as Smithson's Spiral Jetty show a desire to return to nature and simple elements. Judy Chicago and Miriam Schapiro esdtablished the Feminist's Art Program in 1971 citing that women have a different artistic sense. Public art is art that is designed for broad public spaces rather than museum walls or private collections. The Vietnam Veterans' Memorial is an example, and the Oklahoma bombing memorial as well.
Patronage affects the popularity, as well as the cost.
Again, art is subjective and a personal experience to each who views it. One must also chose to to assume the art.