MAPT and proteostasis deficiencies: Proteinopathy subtypes may have different morphological features and anatomical distribution that may influence our comparisons of FTLD-Tau vs. FTLD-TDP; however, we rigorously accounted for subgroup differences in our models, and we validated our findings with additional (relative) measures of pathology, such as the WM-to-GM ratio and LFB ordinal ratings.