How unique was SN 1987A ?

Supernovae of type II are found to exhibit a correlation between maximum mass and parent galaxy luminosity. This correlation might be understood by assuming that the metal-rich red supergiant progenitors of type II SN in luminous galaxies have more extended photospheres than do those of the more metal-deficient evolved progenitors of type II SN on low-luminosity galaxies. For h = 0.5 it is found that SN 1987A was about 1.5 mag fainter at maximum in blue light than any other well-observed type II SNs. For h = 1.0, SN 1948B, SN 1973R, SN 1972Q and SN 1987A exhibit comparable maximum M(B).