Samples comparison of outflow derived properties. Panel a: Distance between the wind and the SMBH versus mass outflow rate. Panel b: Kinetic power versus outflow momentum rate. Each UFO sub-sample follows the same color/marker code as Fig. C.1. The dashed magenta lines show the median values. The gray arrows represent the upper/lower limits for the log(ξ) and N_H values (see Table A.2). We observe statistically significant differences for the launching radius and energetics of the wind (see Sect. 4.3).