Frontotemporal Dementia (FTD) and Early-Onset Alzheimer's Dementia (EOAD) can occur in the same age group and have overlapping symptoms, often complicating diagnosis. In this study, we focused on trying to understand cortical thickness as a biomarker of dementia type. More specifically, we wanted to classify EOAD vs FTD using only data from T1w MRI. We found that classification of FTD vs EOAD using FreeSurfer and ANTs cortical thickness data is highly dependent on the type of classifier used. In addition, it seems that ANTs is better suited than FreeSurfer independent of classification model.