Extraction-consistency diagnostic between adopted X1D and continuum-peak-centered S3D line fluxes. This comparison is not a photometric aperture correction. The plotted S3D/X1D ratio uses lines detected in both products. The S3D extraction is a circular 0﹩\mathop{.}\limits^{{\unicode{x02033}}}﹩8-radius aperture centered on the brightest median-continuum spaxel; it is a consistency diagnostic, not a flux-matched replacement for X1D. The gray band marks the factor of 2 review interval. Circles lie within that interval and triangles outside it receive an aperture-review flag; color does not encode final decision status. Lines detected in only one product are also flagged and assessed in the final decision table.