Although music education researchers often utilize music major status as a single-item proxy variable for musician status--and with this designation presume musical competencies or abilities of research participants--there is a lack of research demonstrating links between status as a music major and those assumed competencies. In this study, we compared undergraduate music majors and non-music majors (N = 237) at the group and individual levels using Goldsmiths Musical Sophistication Index (Gold-MSI), a well-established measure of multiple ways in which people report engaging with music. Comparing group means, we found that music majors scored higher than non-music majors on each Gold-MSI subscale. Moderate distribution overlap suggested that these results should be considered cautiously. A logistic regression analysis further suggested the complexity of using music major status as a single-item measure, given that music major status was only strongly predicted by the musical training subscale. Measures such as Gold-MSI may provide a viable and psychometrically sound way of determining musical sophistication that will allow more granular and refined analyses of studies relating to musical competencies.