Light

Electric Current

Elementary particle

Photon

Electron

Speed

 (in vacuum)

Electric current speed is close to the speed of light (c),

The average drift velocity of an electron is  in copper

Interaction between elementary particles

No

Yes (Magnetism)

Superposition possible

Yes

Hardly possible

(different frequencies required)

Ways to save an elementary particle

Only indirect: Photons cannot be saved directly

Direct (e.g. in capacitors),

Indirect (e.g. on magnetic tapes)