IC flux predictions of the three models, together with the Fermi-LAT and H.E.S.S. flux points derived in this work. The LHAASO flux points, taken from Cao et al. (2021), are only shown for comparison. The dashed, dotted and dash-dotted lines show the individual contributions of seed photon fields for the variable B-field model. The bottom panel shows the ratio of the data points as well as the constant B-field and K&C model with respect to the variable B-field model.