I know both are darker than TNG.
But I know the common thing is Voyager is darker than TNG but not as dark as DS9. But some episodes of Voyager make me think it's on par with the more graphic episodes of DS9. "Scorpion" and "Living Witness" come to mind. "Scorpion" has some fairly graphic scenes (including Harry Kim getting hurt by one of the aliens).
But I know the common thing is Voyager is darker than TNG but not as dark as DS9. But some episodes of Voyager make me think it's on par with the more graphic episodes of DS9. "Scorpion" and "Living Witness" come to mind. "Scorpion" has some fairly graphic scenes (including Harry Kim getting hurt by one of the aliens).