Comparison of a subset of our MUSE spectra (black lines) with the XSL spectra (red lines; boxcar smoothed over 8 pixels). The spectra are normalized to unity between the two vertical dotted lines shown on the left panel, and shifted vertically for display purposes. Left panel: entire MUSE spectral range, right panel: zoom onto the Hβ, Hα, and Ca triplet wavelength ranges (left to right). No radial velocity corrections are applied.