Real-space two-point correlation function comparison between the COVMOS and the DEMNUni_cov experiments. Top: estimated and averaged correlation function monopoles over 100 realisations of COVMOS catalogues in 16nu cosmology at z = 0, with dispersion on each realisation represented in blue. The solid black line represents the averaged power spectra (with dispersion over measurements in dashed black lines) over 50 DEMNUni_cov simulations. Bottom: residual between the COVMOS and DEMNUni_cov outputs, with error bars.