These two Senator theatre pictures seems to have been taken with the exact same exposure settings.
The R2D2 canyon shot seems to have more or less the same brightness level as the GOUT but the shot with Luke looking at the sunset is clearly much brighter and with higher contrast.
The question remain though if it was a 'deliberate creative decision' to make the sunset appear darker in the GOUT (1993 telecine) or simply the effect of the colourist trying to hide the defects from a noisy and faded print, which is what I tend to believe.