Differences between the effective faint-end slope α of the UV LF measured over the UV luminosity range M _UV −18.0 mag to −15.0 mag and over the range M _UV −18.5 to −16.5 mag. The former luminosity range is more indicative of faint-end slope determinations from lensing-cluster studies like the present one, and the latter range is more indicative of determinations from blank-field studies that utilize HUDF samples (e.g., B21a). The presented results are based on the model LFs shown in Figures 12 and 13 and are shown as a function of redshift. The median difference Δα seen across all of the model LFs is shown as the thick shaded black line and appears to lie in the range ∼0.00–0.15.