Comparison of the SpT measured in this work (see Sect. 3.1) and the SpT from the literature. Sources belonging to Cha-I are shown with orange circles, to Upper Scorpius with blue circles and to Ophiuchus with pink circles. We also show the 1:1 and ±1 SpT relationships with the black solid and dashed lines, respectively. A small offset in the SpT measurement from the literature has been applied to all sources for clarity.