What is more representative of the true structure of a molecule from a ball an stick or space filling?

Space-filling models are generally more representative of the true structure of a molecule because they illustrate the relative sizes of atoms and how they occupy three-dimensional space, reflecting the actual volume that the atoms occupy. Ball-and-stick models, while useful for depicting bond angles and connectivity, can oversimplify the arrangement by not accurately representing the spatial distribution of electron clouds. Therefore, space-filling models provide a better visualization of how molecules interact in real environments.