What's the difference between archon and demiurge?

Archon

Definition:

(n.) One of the chief magistrates in ancient Athens, especially, by preeminence, the first of the nine chief magistrates.

Example Sentences:

(1) The most characteristic radiographic pattern--which is observed in any type of the disease--consists in osteopenia associated, in most cases, with multiple fractures and deformities--e.g., micromelia, large metaphysis, archon long bones.
(2) It's the possible removal of this byway, together with the display of human remains at the visitor centre, that is most exercising the man we might think of as Stonehenge's alternative archon, Arthur Uther Pendragon (born John Rothwell), the leader of the Loyal Arthurian Warband – a neo-druidic order with strong political and environmentalist tendencies – and the self-proclaimed reincarnation of King Arthur.

Definition:

(n.) The chief magistrate in some of the Greek states.
(n.) God, as the Maker of the world.
(n.) According to the Gnostics, an agent or one employed by the Supreme Being to create the material universe and man.

Example Sentences:

(1) It is this reality that leads me to believe that the premise of the ICTY – to try key actors of the immediate post-Yugoslavian demiurge, but to individualise their responsibility – is in essence correct, but, in the context of its practical consequences, wrong.
(2) Acting as the patient's maternal uncle, as trapper-hunter, and as demiurge and weaver, the healer aims at fighting the illness by turning it back against itself autodestructively.