Relation between the most likely counterpart best redshifts z_ctp and the corresponding eROMaPPer cluster redshifts z_ero, split by cluster class. The 1σ error bars corresponding to these best redshifts are indicated in gray. The black lines show z_ctp = z_ero ± m(1 + z_ero) with m = 0 for the straight, m = 0.05 for the dashed lines, and m = 0.15 for the dotted lines. Since photometric redshift estimates for Galactic counterparts are unreliable, we do not show Class 1.