Comparison of expected galaxy distributions in SFR and BHAR from SPRITZ and the Santa Cruz SAM over a 10 sq. deg light cone with an integration time of ∼150 h per square degree. The contours indicate the density of sources, and the magenta cross in the right panel shows the expected extraction uncertainties for the median galaxy (Sect. 2.4). Each panel has about 30 000 sources detected at 5σ or better over half the PHI bandpass, but only ∼4% are hybrid AGN+SF galaxies in the SC SAM, while ∼44% of the SPRITZ sources are hybrid. In models like the SC SAM, the rapid growth of the black hole leads to stopping the SF activity, while empirical models calibrated against FIR data, such as SPRITZ, predict a large number of co-evolving systems.