Left panel: Distribution of matched detections in the redshift scatter, |Δz|/(1 + z) – radial separation, Δr [Mpc/h] plane for an initial matching with maximum separation dz = 0.05(1 + z) and dr = 0.5 Mpc/h. Most of the matched detections are concentrated in the rectangular area at Δr < 0.2 Mpc/h and at |Δz|/(1 + z) < 0.01. Right panel: Distribution of the redshift scatter for the mock matching (dashed black line) compared to the scatter between group photo-z and group spec-z estimated as the mean of spec-members with P > 90%, in two intervals of redshift (solid purple and green lines). The distributions are normalized to 1.0 to better compare scatters.