Comparison of the spectrum of SN 2020aeuh at +99 days with a selection of other interacting Type I SNe. The shown Type Ia-CSM (in red) are SNe 2018evt, 2020aekp, 2020qxz (Sharma et al. 2023), and SN 2020eyj (Kool et al. 2023). Type Ibn (blue): SN 2006jc (Foley et al. 2007), SN 2019deh, and SN 2019iep. Type Ic (brown): SN 2019hgp (Gal-Yam et al. 2022) and SN 2021csp (Perley et al. 2022). All spectra have been shifted and multiplied by a numerical factor for visual purposes. Phases are relative to first detection. Dashed lines mark the calcium features. Solid lines indicate the calcium velocity offset estimated for SN 2020aeuh.