How is the formation of coal, oil and natural gas similar and different?

Do a Socratic search for a similar question, "How does the formation of coal differ from that of natural gas and oil?" which has already been answered.

Similarities: they are both formed from organic remains and both form under enormous pressures in a sedimentary sequence.

Differences: coal is formed from land-based plants in bogs and coastal swamps, while oil and gas are derived from tiny marine organisms, such as algae and phytoplankton.