Here, we show that the underlying Pt NP structure of Pt 13 + H 2 is much less diverse than Pt 13 + 2 H 2 and that the vast majority of the 10000 structures have a very similar structure to the one we initialize the pyGlobOpt calculation with. Pt 13 + 2 H 2 structures are more spread out with a larger number of them having significant divergences from the initialisation structure purely due to LO. However, it is also apparent that a significant change from starting structure is necessary for the on surface structures to move to a lower energy as 'more similar' structures to that of the Pt 13 GM tend to exhibit a higher energy.