A comparison between OQQ J0751+4028 and QSO2s: (left) unabsorbed 2–10 keV luminosity against 12 μm luminosity. X-ray luminosities for QSO2s are from Vignali et al. (2006) (V06; green diamonds), Vignali et al. (2010) (V10; orange diamonds), and Lamastra et al. (2009) (L09; pink diamonds). Relationships from Asmus et al. (2015, A15) and Stern (2015, S15; 12 μm luminosities were converted to 6 μm luminosities using a relationship derived from the QSO template of Hao et al. 2007) are shown as gray lines. (right) Unabsorbed 2–10 keV luminosity against [O III] luminosity, with the relationship from Lamastra et al. (2009, L09).