Value of the ratios of the power spectra of X for SO LAT+FYST compared to SO LAT(). The ILC-extracted Compton-y signal (y_ILC) and r_X represent the residual noise of the quantity X. The shaded regions are the density distribution of the ratios over the ℓ range. The bar is the mean averaged over the ℓ range of the ratio distribution. In blue is the ILC case (see Sect. 5.1) and in orange is the CILC case when CIB is deprojected (see Sect. 5.2).