Swift-XRT flux reported by Giommi et al. (2019) as a function of eROSITA flux, following the color scheme introduced in Fig. 3. The mean values of all measurements for a source listed in Giommi et al. (2019) are shown. The uncertainties of the Swift-XRT fluxes represent the minimum and maximum values provided by Giommi et al. (2019). The solid line represents the unity line, while the dashed ones indicate a factor 10 difference between the measurements.