one difference between multiethnic and multinational states is

the amount of land
the stability of each state
the way leaders are selected
the numbre of ethnicities living in the area
the relationship between the diff ethnicities

The difference between multiethnic and multinational states lies in the relationship between the different ethnicities.

In a multiethnic state, there are multiple ethnicities living within the same geographical area, but they may not necessarily have distinct or separate political entities. These ethnic groups often share a common citizenship and are expected to assimilate into the dominant culture or national identity of the state. The focus is on creating a unified, homogeneous nation-state.

On the other hand, a multinational state consists of multiple distinct nationalities or ethnic groups, each having their own distinct political institutions, territories, and often language. These groups may have varying levels of autonomy and are recognized as separate entities within the state. The focus is on respecting and preserving the rights and identities of each nationality or ethnic group within the state.

The difference in the relationship between ethnicities is significant in terms of the level of cultural autonomy, self-governance, and representation accorded to different groups. It can also impact the political stability of the state, as tensions and conflicts between ethnic groups may be more pronounced in multinational states compared to multiethnic states.