Spectra for the bright and the red SNe discussed in Sects. 3.5.1 and 3.5.2. We display the classification spectrum from TNS together with a named template spectrum to illustrate the quality of our spectra. For most objects we also have additional spectra (see Fig. 3), and we provide some of these here as well. All these spectra are made available on Wiserep. Our spectra are shown in red, where the black line is a smoothed version. The name of the used telescope is also provided. The classification spectrum for SN 2019pfp is from Terreran (2019) and the one from SN 2020abqx from Burke et al. (2021).