Opinions from the Sony Xperia XZs

I have been a father recently, so I need a phone with which to make quality photos to remember, before I had a Xiaomi Redminote 3, which did not measure up. I wanted a phone that could have a one-hand operation (less than 5.5 ") and for less than € 300. I could compare it to a hand-to-hand with an S8 and I must say that the daytime photos practically do not make any difference, now the night is quite noticeable while the S8 point of light does not blur them, the Xperia does it despite having less focal aperture.When making Selfies is much appreciated the button of the trigger that includes the phone on the side. Default, I only see one in the Photography App that comes preinstalled, has very few options.