Final answer:
Centrally planned socialism is characterized by state resource ownership and command planning, exemplified by the former Soviet Union's economy. Market socialism introduces limited private ownership and market influence within a socialist framework.
Step-by-step explanation:
Centrally planned socialism involves two main characteristics: first, state resource ownership, where the government owns or controls the means of production, and second, command planning, where economic decisions including what to produce, how much to produce, and pricing are made by the state rather than being determined by market forces. These aspects were evident in the former Soviet Union, where the central government made all economic decisions and market forces played a very limited role. As a contrast, some countries have moved from central planning to market socialism, allowing certain market principles like limited private ownership and for market demand to help determine production and pricing decisions.