In view of the undeniable relationships between empirical dispersion corrections and genuine dispersion energies, as documented in Section 3.2.2, we embarked upon a more thorough comparison. Figure examines SAPT+MBD dispersion energies for the S66 data set in comparison to D3, D4, XDM, and MBD corrections. Mirroring what was observed for the S22 data set, each of these corrections is systematically smaller (less attractive) as compared to SAPT+MBD dispersion. However, the corrections are rather consistent with one another, even if XDM is slightly less attractive than D3, D4, or MBD. The dispersion corrections are smaller for the hydrogen-bonded systems (defined by the condition |E elst | > 2|E disp |) as compared to the dispersion-dominated systems (where