θ_E,II vs. θ_E,I. Green diamonds depict the objects used to construct the plots shown in the right column (top and middle panels) of Fig. 5. Green dashed line shows the fit to the data. Similarly, the blue filled diamonds are the objects associated with the correlations shown in the right column (top and bottom panels) of the same figure. Blue dash-dotted line shows the fit to the data. Blue squares are groups with giant arcs (see Sect. 4.1), magenta triangles are those groups with strong lensing model (see Sect. 4.3), and the red continuous line shows the one-to-one relation. The error bars are omitted for clarity.