Structural quantities of the nucleated (violet) and non-nucleated (green) early-type galaxies in the Fornax main cluster and Fornax A group. Column (1): structural quantities as functions of the galaxy stellar mass. The black lines denote the moving averages (median). Column (2): residual quantities, calculated as the measured quantities minus moving average from Col. (1). The solid lines denote the moving averages of the residual quantities. The dashed grey vertical lines denote the range where both samples overlap in stellar mass. Column (3): histograms of the residual quantities between nucleated and non-nucleated galaxies within the overlapping stellar mass range. The coloured dotted lines denote the median value of each sub-sample. For brevity, here we show quantities of interest. The full plot with all considered quantities can be found in Appendix E.