Probability density distribution (pdf) of the primary and secondary BH masses, m_1, 2, the effective spin, χ_eff, and the precession spin, χ_p, in the five channels modeled with FASTCLUSTER: active galactic nuclei (AGNs) with GH (solid dark red line) or with no-GH (dashed bright red line), NSCs (dark gray line), GCs (light gray line), YSCs (dark gold line), and isolated binary evolution (light gold line).