Comparison between the source angular sizes (θ, upper panel,listed in Table 4), the FWHM of the lines (middle panel, Table 5), and the excitation temperatures (T₂, lower panel, Table C.1) of MF and DE, obtained with the molecular line fitting procedure at 2 mm. The dashed lines are the linear best-fits to the data. The linear correlation coefficient (r) is also given. Values without error come from fits performed with the relative parameter fixed.