Comparison of the flattening of the galaxy cluster distribution to the X-ray sample from Böhringer et al. (2021, see text for description) and to the simulation using the same mass (black) and the same X-ray luminosity (blue solid line) cut. The dashed and the dash-dotted red lines apply the same measurement in the other supergalactic coordinates for comparison. The dashed and dash-dotted blue lines are slightly different cuts in X-ray luminosity.