Coarse-grained models are known to overestimate diffusivities due to the loss of friction associated with the missing degrees of freedom. This trend is reproduced across all models (Fig. and), with the overestimation increasing with decreasing resolution (e.g., the three-bead R3 vs the single-bead R5 mapping of butanol). The more complex potentials associated with the ML, TL, and T L SP models exhibit a small but consistent reduction in diffusivity errors. This is evidence that these models are partially capturing forces missed by the simpler models. This is also consistent with the marginal reduction in force errors for these models (Fig. ). Whether the forces being captured are true CG forces or over-fitting to frictional forces is more difficult to determine.