Comparison of the spectra of known young T-dwarfs to that of 51 Eri b. Similar to the field sequence, the fits presented here were computed using the restricted chi-squared. From top to bottom, the four spectra were sourced from Luhman et al. (2007), Naud et al. (2014), Burgasser et al. (2006), and Delorme et al. (2012).