Comparisons of the ZAMS mass-remnant mass relation between the updated BSE (thin, black line) and StarTrack (thick, blue line) for lower ZAMS masses (1 M_⊙ − 20 M_⊙) for F12-rapid remnant mass model. Over this mass range, the switching from WD formation to NS formation is evident (NS formation from the first drop of the curve to 1.26 M_⊙). The comparison is shown for the two metallicities Z = 0.02 and 0.0017.