Comparison of the pre-maximum (left panel) and post-maximum (right panel) spectra of ZTF18aaqeasu to the normal Type Ia SN 2011fe (Maguire et al. 2014), the over-luminous SN 1991T (Filippenko et al. 1992b) and the sub-luminous SN 1991bg (Filippenko et al. 1992a). The magenta dashed lines in the left panel indicate Si II lines at a velocity of 10,000 km s−1. Prominent emission/absorption features are marked in both panels. Spectroscopic data for the comparison SNe were obtained from the WISEReP repository (Yaron & Gal-Yam 2012).