Peak III configurations can be uniquely assigned to the B complexes. The M complexes can be identified with the peaks in the region from 0.32 to 0.39 nm, which are only present for x water = 0.198. Configurations with a center of geometry distances bigger than 0.40 nm can be assigned to OSCs. For the x water = 0.198 complexes are shown as trajectory snapshots in In light of these complexities, it is possible to understand the limitations of the coarsegrained model. The substructure is averaged out, leaving no possibility of reproducing these configurations with a single pair potential. The fixed bead size, which results in an overestimation of the distance between the calcium ions and carboxylate groups, could contribute to the underestimation of the coarse-grained SOM density. The aggregations may play a less important role for systems with higher water content, which could, on the other hand, explain the lesser discrepancy between the densities in these cases. It is natural for a coarsegrained model to lose features that are more connected to many-body interactions. When using the coarse-grained SOM model, it is essential to clarify whether reproducing such features is critical when observing the quantities of interest.