Comparison of selected lines in the UVES (solid blue) and the X-shooter (dashed pink and dotted yellow) optical spectra. The high resolution UVES spectrum is binned by 0.15 Å to match the X-shooter spectra. All spectra are convolved with a Gaussian having a FWHM = 0.05 Å for a better comparison. The lines in the UVES and X-shooter (2022) spectra are separated, while they are blended in the X-shooter (2020) spectrum. This provides a clear indication for binarity.