Mass and richness for the SpARCS cluster samples (green filled circles) compared to the CFHTLenS analysis results (Ford et al. 2014), where the corresponding values are transformed into the N_red parameter as described in the text (blue filled squares). The errors of the CFHTLenS data points have the fit uncertainty from Fig. 12 propagated as well. The red dashed line shows the mass–richness relation from Eq. (23), with its uncertainty represented by the red shaded region, while the GCLASS-based mass–richness relation (Eq. (22)) is shown by the black dashed line and respectively the shaded grey area.