Variance-weighted temperature difference between the mean CMB temperature in voids (inner temperature profile bin of the largest quartile of voids from Fig. 6) and the mean CMB temperature around galaxies (from H2025). The histogram shows the temperature difference in 10 000 SMICA simulations in terms of standard deviations calibrated on simulations. The red curve shows a Gaussian fit to the histogram. The blue line shows the corresponding difference in the data.