How is a structural formula similar to a molecular formula? How is it different?

Similarity between the two:

Molecular formula and structural formula gives the exact number of atoms of different chemical elements that are present in a compound.

Difference between the two:

Structural formula gives us the relative positions of the atoms that are present in a compound whereas molecular formula does not give us the relative positions of the atoms. But it gives us the ratio of atoms in a given compound.