Upper panels: comparison of the galaxy-wide average stellar metallicity (weighted in mass) derived from the spatially resolved spectral analysis () and the integrated metallicity derived from fitting the total (integrated) galaxy spectrum (). Lower panel: comparison of with the value measured at R = 1 HLR (). Left and right panels show results obtained with base GMe and CBe SSPs, respectively. All panels include 300 galaxies. The difference between the y-axis and x-axis is labeled in each panel as Δ, and the dispersion as σ.