The models are the alike in that they describe the arrangement of atoms in molecules. They are different in the manner by which they show the arrangement of atoms.
What are molecular models?
Molecular models are tangible or pictorial depictions of molecules arranged in three dimensions. They serve as visual aids for explaining the geometry, structure, and spatial arrangements of atoms within molecules.
Molecular models can take the form of concrete, physical structures like space-filling models or ball-and-stick models, which depict bonds as sticks and atoms as spheres.