The Cult of the Supreme Being is exactly the kind of religion you might expect a committee of government bureaucrats to produce -- generic, efficient and completely uninspired.
This credo was taken to the next natural level, atheism, by many of his contemporaries, who had been significantly shaped by their hatred for the institution of the church, as well as possible affiliations with the Freemansons and the Illuminati.
The only tenets of the Cult were that the Supreme Being existed and that man had an immortal soul.
The Cult of Reason (French: Culte de la Raison) was a religion based on deism devised during the French Revolution by Jacques Hébert, Pierre Gaspard Chaumette and their supporters, in opposition to the Cult of the Supreme Being instituted by Maximilien Robespierre.
The Cult of Reason was intended to complement, in the religious sphere, the radical opposition of the enragés to Robespierre's political project.
Both cults, however, were the outcome of the "de-Christianization" of French society during the Revolution, and suffered during the Thermidorian Reaction and Napoleon Bonaparte's rapprochement with Roman Catholicism.