The cut-off energies of the two sources are relatively high compared with both the [[*INTEGRAL*]{}]{} high-energy cut-off distribution reported by [@malizia2014], which has a mean of 128 keV with a spread of 46 keV, and with the values recently measured with [[*NuSTAR*]{}]{} [@tortosa2018; @lanzuisi2019]. Among the 19 bright sources observed by [[*NuSTAR*]{}]{} and discussed by [@tortosa2018], only two have a cut-off $>200$ keV and a coronal temperature $>70$ keV with a percent error $\lesssim 50\%$.

From a fit with a thermal Comptonisation model and assuming a spherical geometry, we obtain in both cases a coronal temperature of 70-80 keV and an optical depth close to two. In the case of [NGC 4388]{}, the temperature of [$80^{+ 40}_{- 20}$]{} keV is consistent within the errors with the upper limit of 70 keV reported by [@lubinski2016], who use the same model (i.e. [[compps]{}]{} with spherical geometry). In the case of [NGC 2110]{}, instead, the temperature of [$75^{+ 20}_{- 15}$]{} keV is much lower than the value reported by [@lubinski2016], who find a lower limit of 160 keV. However, [@lubinski2016] also report a relatively large reflection fraction of $\sim 0.6$, which is not consistent with the [[*NuSTAR*]{}]{} and [[*Suzaku*]{}]{} constraints [as already noted 