Top: 2RXS and XMMSL2 fluxes for the ~1000 SPIDERS-AGN sources observed with both instruments. The X-ray fluxes were converted to the soft X-ray band 0.5−2.0 keV using Γ=1.7 for 2RXS and Γ=1.25 for XMMSL2, value chosen to match the peaks of the two distributions. Bottom: ratio of the converted flux logs as a function of the 2RXS fluxes for the same sources shown in the above panel. The dashed lines represent the ±5% level on the ratio, within which 94% of the converted fluxes are.