Distribution of cluster ages for two parent galaxy samples, divided by galaxy distance, the nearest between 5 and 12 Mpc (IC 5332, NGC 0628c, NGC 3351, NGC 3627) and the furthest between 17 and 20 Mpc (NGC 1566, NGC 1433, NGC 7496, NGC 1512, NGC 1365). Although the mean ages are very similar (7.40 vs. 7.47), the distant galaxy sample contains a large fraction of very young clusters around log(age/year) ≈6, where the age determination is most degenerate, as well as some of the oldest clusters in the dataset. By contrast, the nearest set of galaxies has more clusters at intermediate ages. These differences in age distribution complicate the interpretation of Figure 7, since it is not straightforward to determine in which regime the model error should be expected to dominate.