In addition to the low energy and force errors of the UFP shown in Figure , it is also important to validate the behavior of the UFP relative to high quality first principles methods. Therefore, we compare the structural models generated using the UFP with literature models generated from ab-initio molecular dynamics (AIMD). The radial distribution function (RDF) for -LPS and am-LPS in a 300 K, 1 µs simulation with the UFP is shown in the Supporting Information, Figure , in comparison with two literature references for the RDF ofand am-LPS from AIMD . The UFP simulated RDFs for both -and am-LPS show excellent agreement with AIMD. We also compare the UFP with the established method of Turbo-GAP for -LPS and am-LPS using the mean square displacement (MSD) at 500 K (see Figure in the Supporting Information). We reach a perfect agreement for the am-LPS and a deviation of a factor of five for the -LPS. The deviation can be explained with a much higher sensitivity of the MSD on the barrier height and density in the crystalline material and could potentially be improved by extending the dataset with additional nudged elastic band calculations over Li hopping events.