Comparison of the SN 2012aa quasi-bolometric light curve with those of SLSNe Ic and SNe Ibc. The SLSN datasets are obtained from Inserra et al. (2013) and Nicholl et al. (2015), while the SN Ibc datasets are from Taddia et al. (2015). SLSN-R are distinctly different from SLSN-I. There may be two categories (A and B) of SLSN-I. The solid lines represent the mean of each population. The plot also presents the decay rate of ⁵⁶Co and the well-observed Type II SN 1987A, which had a nebular decline consistent with ⁵⁶Co decay.