Comparison of subhalo mass functions in our five zoom-in simulation suites with GALACTICUS predictions. In each panel, the solid line shows the mean cumulative Symphony SHMF stacked over all simulations in each suite, the shaded band shows the 2.5th–97.5th percentile range, and dashed lines show the corresponding GALACTICUS predictions and percentiles. Vertical dashed lines show the conservative subhalo mass resolution limit for each suite, corresponding to 300 times the highest-resolution dark matter particle mass.