Comparison of stellar metallicities using different prior functions. The stellar metallicities obtained from spectrophotometric modeling (x-axis) are compared with those derived from photometry-only fits (y-axis), using a flat prior for Z_⋆ in logarithmic space (top panel) and linear space (bottom panel). The dashed orange line represents the one-to-one relationship, while the contours enclose 20%, 50% and 80% of the total data. The inset in the top-left corner shows the residual distribution, log(Z_{⋆, spec + phot}/Z_⋆, phot). Meanwhile, the inset in the top-right corner compares the fiducial Z_⋆ from spectrophotometric modeling (orange distribution) with the photometry-only results (purple distribution). The dotted lines correspond to the prior probability distributions, scaled by an arbitrary factor for clarity. The mean offset and scatter between the two distributions are reported in each panel.