Ratios of simulated spectra of MOB (Eq. (4)) to LOB (Eq. (3)) objects. We assumed Γ = 1.8, E_C = 300 keV for the continuum of all spectra. We tested different values of i and N_H (N_H = 7 × 10²³   cm^-2 and N_H = 5 × 10²⁴   cm^-2) for the spectrum of MOB Sy2s, assuming R = 1 for all the spectra, and N_H = 0 for LOB Sy2s (left panel). We tested different values of the reflection parameter (R = 0.4 and R = 0.2 for LOB objects, fixing R = 1 for MOB Sy2s), and of i (only for MOB Sy2s), setting N_H = 3 × 10²³   cm^-2 for MOB Sy2s and N_H = 0 for LOB Sy2s (right panel).