The main difference between the two is their political systems and forms of government. The DRC is a presidential republic while the Republic of the Congo is a presidential republic with a multi-party system.
Another difference lies in their size and population. The DRC is the largest country in sub-Saharan Africa by land area and has a population of over 85 million people. On the other hand, the Republic of the Congo is much smaller in both land area and population, with around 5 million people.
Additionally, the DRC has faced a history of internal conflicts and struggles for power, while the Republic of the Congo has enjoyed a more stable political situation.
Economically, the DRC is known for its vast natural resources, including minerals like cobalt and copper, while the Republic of the Congo relies on oil as its main export.
In summary, the Democratic Republic of the Congo and the Republic of the Congo differ in their political systems, size, population, political stability, and economic focus.