To see how the four cameras performed in lower light, we again turned to a real-world shot of downtown Seattle. In this example, we used whatever settings that we could to get each camera to capture a handheld photo that resembled what the eye could see.
Thus, exposure settings and ISO sensitivity will vary from camera to camera.
The first thing that jumps out at you is the strong purple fringing on the WG-4. The whole image has a purple cast, but when white balanced the aberrations are still there. The Olympus TG-3 with the same lens has no such aberrations.
All four photos were taken in Program mode or Auto if the camera does't offer that. Three of the four cameras used ISO 800 for this photo, while the Nikon could get away with ISO 400. As you scroll around the image you'll see that none of the cameras performed very well, with mottled, smeared details. The Nikon looks the best here, likely due to the lower sensitivity that it's using.
In reality, most buyers of these cameras won't be inspecting images at 100%. Instead, they'll bethem or them for e-mail or sharing on social networks.
It's a shame that none of these cameras support Raw, as you'd be able to get around the heavy-handed noise reduction used by all four cameras, and likely get better results.