Comparison of the relation between stellar metallicity and SSFR at fixed mass as obtained with different SFR estimates. The upper panels display the SSFR versus stellar mass and the binning into distance from the MS; the bottom panels display the stellar metallicity-mass relations for bins of distance from the MS, as in Fig. 3. These plots are based on SFR estimates from spectrum+photometry Prospector fit (Nersesian et al. 2025), instantaneous (left plot) or averaged over the previous 100 Myr (right plot).