Pixel-to-pixel comparison of retrieved FeO abundance vs. LP-GRS at 1^∘ resolution, restricted to the common valid-pixel subset shared by all eight compared methods (n = 43,721, 93.4% of the full 65^∘S–65^∘N grid; dashed line = 1:1). (a) Kaguya MI (this study); (b) Kaguya MI (M. Lemelin et al. 2015); (c) Clementine UVVIS (P. G. Lucey et al. 2000); (d) Clementine UVVIS (D. Qiu et al. 2025a); (e) Kaguya MI (C. Yang et al. 2023); (f) Kaguya MI (L. Zhang et al. 2023); (g) Kaguya MI (X. Shi et al. 2026); (h) Kaguya MI (C. Bian et al. 2025).