Comparison between terminal wind speed found using direct measurement v_∞(DM), against that found using the SEI method v_∞ (SEI). Upper panel: LMC sample. Lower panel: SMC sample. Symbol shapes and colours indicate different quality categories from best (i) to worst (iv) (see the legend and Sect. 4). The solid black line is a one-to-one relation between v_∞(DM) and v_∞(SEI). Conservative uncertainties of 200 km s⁻¹ on each measurement are visualised through the grey cross in the lower right corner of each panel.