where X = MVG, LG(OI); Y = aTZ, QZ, aQZ; W = SVWN5, HSE06; and Z = Mol, PBC. In other words, ∆ QZ in Eq. 40 tests the change in basis set and choice of gauge within the same method (W ) and system (Z), while ∆ HSE06 in Eq. 41 tests the change in functional within the same choice of gauge (X), basis set (Y ), and system (Z).