Thanks to a thread on Reddit created by guyman101, he has basically taken photos with both devices and compared them side by side. According to him, “The 1520 is still a beast, don’t get me wrong, but after comparing the pictures I took with it to those that came out of the 950XL, I have to say that it is night and day! I was already sold on the 950 XL, but the pictures I saw comforted me in my position. My girlfriend and I pre-ordered 2 units without hesitation.”
As you can see in the comparison photo above, the image to the left is the Lumia 1520 and the one to the right is the Lumia 950 XL. It might be a bit hard to tell because of the resized image, but if you were to look closely, the Lumia 950 XL has a brighter and sharper image. The front-facing camera is even more telling.
With the Lumia 1520, the white balance seems to make the photo “colder” and provides a blue tinge to it, while the Lumia 950 XL is warmer and has a yellow and slightly more saturated look. If you’d like to see the higher-res photos and other samples, hit up guyman101’s Imgur for the details. In the meantime what do you guys make of it?