Classical (left) and spectroscopic (right) HR diagrams, built using the Ekstroem et al. and the Brott et al. tracks with rotation. Overplotted are corresponding isochrones for 1, 2, 3, 4, and 5 Myr (for the HRD only). Same symbols and colours as in Figs. 5 and 6. On the left plots, vertical lines connect the two luminosity solutions foreach star with two entries in Table 2 (clearly seen when zoomed in). For more explanation, see Sect. 5.2.