Left panel: this plot shows the ratio of weak lensing mass to hydrostatic X-ray mass as a function of the ratio of NFW mass profile concentration parameter from weak lensing and X-ray analyses. Right panel: the ratio of weak lensing mass to hydrostatic X-ray mass is a function of offset between X-ray and weak lensing centres. In both panels, the solid line is the best-fitting orthogonal BCES power-law relation between the quantities, and the different sub-samples are colour coded.