Statism (or etatism) is an ideology advocating the use of states to achieve goals, both economic and social. Economic statism, for instance, promotes the view that the state has a major and legitimate role in directing the economy, either directly through state-owned enterprises and other types of machinery of government, or indirectly through economic planning.
Socialism is a political philosophy that encompasses various theories of economic organization based on public ownership and administration of the means of production and allocation of resources.
I don't see any real difference here!