Based on DT points, Helgaker provides a better agreement with PWs in terms of MAE and maximum deviation, especially for the aug-cc-pVTZ/CP combination with a MAE(max dev.) of 0.3(0.8) kcal/mol (Table ) that reduces to 0.07(0.19) kcal/mol when extrapolating with DT data points (Table ). If the available points are TQ instead, the energies obtained by Martin4 are globally closer to the PW values than those of Helgaker, which is also the case for Q5 points albeit in these cases, no extrapolation outperforms the aug-cc-pV5Z/CP calculations and their MAE(max dev.) of 0.06(0.16) kcal/mol (Table ).