Ratio of the eROSITA and Chandra (left) and eROSITA and XMM-Newton (right) single-T fits to simulated spectra with two temperature components as a function of the Chandra and XMM-Newton best-fit single-T, respectively. The blue, green, and red colors correspond to T_cold = 0.5, 0.75, 1 keV, respectively. The hot component has values of T_hot = 1, 2, 4, 6 keV. The circles, triangles, and squares correspond to emission measures of EM = 0.05, 0.10, 0.15 for the cold and hot components. The black curve shows the observed T difference between eROSITA-Chandra (left) and eROSITA-XMM-Newton (right), as presented in Table 1.