PPCs for the resolved CBC analysis (left) and the joint analysis of the two sources (right). The dashed black and solid blue curves show the median and 90% credible bounds, and the red curve is the fiducial value injected. Top panel: Rate density, R(z), of BBH mergers over the local merger rate, R₀, as a function of redshift. Middle panel: Primary mass distribution as a function of the primary mass. Bottom panel: Posterior on Ω_GWh₀² as a function of the frequency. In all the panels, the black line represents the 1σ curve.