Wigner time delay difference between Ar and Ne electrons as retrieved from attosecond streaking measurements. The black dashed line with open symbols represents the data published in Ref. [1], while the blue dashed line are the new data as published in Ref. [2]. In the latter data set, only the error bar of a single experimental point around 39.5 eV is shown because the magnitude of the error bars is approximately the same for all the experimental data points between 28 and 41 eV. The experimental data are compared with two theoretical curves: the thin black line is computed within the RPAE both for Ar and Ne electrons [3]; the magenta one is obtained by using MCHF [4] for Ar and RPAE [3] for Ne and is calculated with an energy sampling of 0.3 eV. Only the MCHF is taking into account the Ar resonances in the continuum.