Alleged Samsung Galaxy S9 camera sample crop gets compared against the Galaxy S8
First of all, there's no way to check the EXIF of the pictures and see if they are really taken with the "advertised" phones. Wishful thinking aside, we should really take these with a grain of salt and all, as there's no telling if the leak is legitimate or not. Looking back on the leakster's profile, they seem to have a certain track record of leaks, but again, question everything in your lives.
So, what does the photo crop show? Well, it depicts a city skyline shot from withing a building, which is usually a recipe for unimpressive dynamic range and overblown highlights due to the way brighter lighting conditions on the outside. Judging from these two samples alone, the Galaxy S9 seems to have a way better dynamic range reproduction than its predecessor as well as better detail rendition to the point where it could be considered vastly oversharpened. As a user on Reddit mentioned, it almost looks as if the Galaxy S9 shot in HDR mode and the Galaxy S8 took the picture with HDR forced off, which seems to coincide with what we see below.
As a reminder, according to early reports the camera of the Galaxy S9 will arrive with variable aperture of f/1.5-f/2.4, suggesting that it could fall back to the wider aperture for extremely low-light scenarios and utlra slo-mo videos where lots of light needs to be collected for a short amount of time and the narrower end of F2.4 for most other situations. Meanwhile, the S9+ is expected to have the variable camera but also add a telephoto lens to the mix that will act much akin to the Note 8 and allow users to play with a bokehlicious Live Focus feature. This will likely be the first time Samsung uses two different camera setups on its flagship Galaxy lineup.