This document compares the accuracy of MMFF and UFF forcefield models to DFT calculations for predicting molecular properties. For 100 molecules, UFF had a much better correlation (R2 of 0.777) to DFT than MMFF (R2 of 0.176). For 400 molecules, UFF again had a better correlation (R2 of 0.738) than MMFF (R2 of 0.006). For 1000 molecules and 3000 molecules, MMFF had a better correlation than UFF, with R2 values of 0.769 and 0.735 for MMFF compared to 0.647 and 0.213 for UFF.