Comparisons of model predictions for stellar mass-BH mass relation with high-z observations on the left and low-z observations on the right. The solid lines show the evolution of light seeds (m_seed = 100 M_⊙ with M_seed = 3 × 10⁴ M_⊙), and dashed lines show the evolution of heavy seeds (m_seed = 10⁵ M_⊙ with M_seed = 3 × 10⁷ M_⊙), both for p_BH = 1. The right panel shows the predictions of the same two models at z ≈ 0 as full and dashed lines, respectively, compared to the local observations.