Tell you what: 950XL wipes the floor with every flagship. Right
not in every situation, its not without some lag, colors are not so true to reality as in new ones, daylight 4K is worse than Some flagships, it don't capture so much detail and got slow focus. Sound not good? Wait....
For DSLR and camera enthusiast, it heavenly good. If you see camera results in detail, no matter what situation(day, night,photo,video) 950/XL wins in: details without noise, warm colors, 3D audio & up to 145dB. One looking at shot/video won't see how much different it is from true colors or how much detail it capture, he will see if its noisy, if also colors are good to look at.
To be detailed: Stills daylight: less detail but also less visible noise, but not in everything, less resolution means sometimes you get output less real than from higher resolution sensor(ex. stripes and other patterns), also after zooming in you see noise, thank Microsoft for that as processing is so great, that even if there is noise, it seems natural.
Stills low light: Way less detail than in others, but also Less noise. Colors pop so you see nice noiseless colory picture, even if with less details than the others. Forget action shots, but after stabilizing and using manual shutter, 20mp results should be better than any camera(again awesome processing).
Video daylight: Again, less sharp and color accurate, but output is warm and noiseless, just try see detail of one frame.
Video low light: Losing in captured detail big way But, again, details are less noisy and surprise - not like 90' movie but colorful as rainbow. Again thank Microsoft. For me it feels like watching old web movie(other phones) then using vlc' gamma&saturation boost to make it watchable. Seriously even stills feel like went though gamma boost - just compare them to raws captured.
Not sure about high iso And long exposure in other phones, but visible purple glow(also thx to gamma boost) can be erased by capturing another shot with really covered lens, so you can subtract that noise(hot pixels).
Would the Microsoft used stacking of shots like the others, nobody would come close in stills.
Now to another part of video - audio in it, ex. pixels use Mono, some stereo, 2 I think 3D using 4 mics, 2 3D using 3 mics. All about to max 135dB. Meaning: with 950/XL loud concert and whatever else can you enjoy as if there (stereo 3D) And without ugly distortion that you will get even in newest phones. Actually That no distortion you won't find in any other brand is actually reason I got mine 950XL. I'm just laughing at premium brands because they sell phones that record mono or devices that record audio sounding like some insect.
Example on tube here( name: Lumia 950 XL ,by some jose carlos).