Hi,
I find it a problem about the intensity of the lights. usually in vray it imposed a value in lumens, and that value remains fixed regardless of the size of the light, and rightly so. In corona it is not so, if you keep a multiplier 50 in a 5x5 cm light, that value distinctly different in a 100x100 cm light.
This is critical to have a proper scale and proportion of the light intensity and it is important to have a realistic result of the scene