Parameters for the sibling SNe Ia in this study. The panels show the redshift (top left), SALT2 x₁ (top right), c (bottom left), and host galaxy stellar mass (bottom right) distributions. We did not make any selection cuts on the values of z, x₁, and c, unlike for the complete DR2 sample (Rigault et al. 2025). The equivalent distribution for the entire DR2 sample is overplotted as dashed lines Smith et al. in prep.