The monodisperse simulations were also performed with and without isomeric diversity, to assess the effect of the existence of metastable structures on sintering. For brevity, we label these two types of simulations are labelled in this study as "Global Minimum (GM) only", and "Boltzmann Population (BP)", respectively. While particle migration and coalescence are not simulated, we did account for cluster coalescence that occurred when clusters grew enough to overlap, without changing center of mass. Further details of the simulations are provided in the SI Algorithm 1 and Algorithm 2.