The density of detections in the MADGICS (this work, left) and Gaia (Schultheis et al. 2023, right) 8621 Å DIB catalog as a function of the DIB width (σ _DIB) and its central wavelength (λ _DIB). The color scale indicates density, where darker colors indicate more detections, and is a common logarithmic stretch for both catalogs. The (λ _DIB, σ _DIB) cuts imposed in defining the Gaia HQ sample are shown as a gray box, inside of which the HQ sample is shown. Outside of that box, the Gaia catalog is shown with only the stellar S/N, DIB S/N, and GSP-Spec flag cuts imposed. Guidelines for the central wavelength of the DIB and stellar lines are labeled and color coded between the plots. Stellar lines in magenta indicate lines not included or not well calibrated in the GSP-Spec line list, and the Gaia DIB detections preferentially cluster at those wavelengths, especially at low σ _DIB. Because the MADGICS catalog inference marginalizes over a data-driven stellar model, it is free from detectable contamination from these stellar lines and provides a more robust characterization of the DIB properties.