Test on the stability of the results with the type of data used: Top - This figure is created by fitting the spectrophotometric data, as in Fig. 16 and Fig. C.2, except that we do not use the sub-mm ones. The trend observed in this case is almost identical, which confirms the less important role of the sub-mm data in separating the two parallel sequences. Bottom - This figure is created by only fitting the photometric data, including the sub-mm ones but not the spectroscopic one. The trend observed in this case is different from when we make use of the NIRSpec spectra. We still do see a small decrease at lower stellar mass, even though the less-marked downturn suggests that without spectroscopy, some strong spectral information, and especially the line ratios, is missing. However, the photometric data still bring an information on the dust attenuation because of the UV slope β_FUV. The correlation of β_FUV with the dust mass is much less significant, and leads to this smaller difference in dust mass, even at low stellar masses which makes the second lower sequence less prominent.