Different nature
In a filter circuit, capacitors, inductors, and resistors make up filters. To obtain a given frequency of the power signal or to get rid of a specific frequency after the power signal, the filter might be an efficient filtering of that frequency or a frequency different from it in the power line.
Inductors are another name for reactors. All electrical conductors that can carry current have inductance in the broad sense because when a conductor is energized, it produces a magnetic field within a specific range of the space it occupys.