In recent firmware the seperate weight and sharpness sliders were combined into a single slider that adjusts both properties, so the Glo you were looking at must be running an older firmware version than your Aura.
However others have noted that the Glo's screen is a bit shaper than the Aura's even at the same sharpness setting, so the lack of a seperate slider might not be the cause of the difference you see. (see
this old thread)