I have 5s from work but I'm done with this tiny screen and memory.
You know it's funny, I was in a carrier store and I picked up an iPhone 6S in 16GB to try the camera vs my 1520. I could not take a picture - the memory was too full.
I was astounded. I poked around and it didn't seem to be full of pics people took in the store (what else could shoppers fill it with?) Instead, it was filled with obvious sample pics as not even the latest was from the location the phone was in. Who knows what the sample pics were shot with? I wasn't impressed with the pics as they were one and all pictures of people's heads obscuring historical and culturally significant objects (selfies). They looked alright, but none of them wowed me or (IMHO) showed off the power of the camera in any real way. Nothing artistic. Just people's heads in the way of things I would have taken pictures of like the Eiffel Tower, The Tower of London, a beautiful tropical beach, the Taj Mahal, a pastoral mountain view... All with grinning mugs front and center.
So, not only was the demo ROM so full that you could not test the camera, it also seemed to say that the iPhone camera is best suited for close up shots of your head in perfect lighting conditions. It saddens me that this has become the standard of photographic excellence.
I too love landscape photography. I have had a 1520 since August of 2014. Love the 20MP sensor. Love shooting in DNG. I'll be honest though, 1520's ability fades with the light... It also has mount problems as the phone + case is so broad that few mounting brackets will accommodate it. And the position of the camera is so deep that clip on solutions to attach extra lenses like telephoto or fisheye simply do not fit in the vast majority of products out there. 950 XL falls into that last limit as well.
Definitely go with 950. From what I've seen it is much more low light capable than 1520. More aftermarket accessories will fit it as well. The samples here look pretty good to me: http://forums.windowscentral.com/mi...res-videos-taken-my-lumia-950-a-new-post.html