Comparison of the early- and late-time r-band photometric evolution of SN 2021aatd to that of iPTF14hls (r + R filters, Arcavi et al. 2017), SNe 1987A (R filter, Hamuy et al. 1988; Whitelock et al. 1988; Catchpole et al. 1988, 1989), 2005cs (Pastorello et al. 2009), 2006au (Taddia et al. 2012), 2020faa (Yang et al. 2021; Salmaso et al. 2023), and 2020xkx (Soraisam et al. 2022, downloaded from the ALeRCE ZTF Explorer). In the cases of SN 2006au and iPTF14hls, there is a large uncertainty regarding the date of explosion; thus, their LCs are shifted to match the LC maxima of SNe 1987A and 2020faa, respectively (following the method of Taddia et al. 2012; Yang et al. 2021).