Real space power spectrum comparison between the COVMOS and the DEMNUni_cov experiments. Top panel: estimated and averaged real space power spectrum monopoles over 5000 realisations of COVMOS catalogues in 16nu cosmology, with dispersion on each realisation represented in colour. The same quantities are represented in black for the 50 DEMNUni_cov realisations. Bottom panels: relative deviations between the averaged COVMOS and DEMNUni_cov measurements in dashed black lines with error bars following the same colour-coding.