This is a project I have delivered a while back, for GMJ design ltd.
One is the photo reference; and the other is the final render based on it.
After I had finished modelling the space and addressing the final design changes, the client later supplied me with a nice professional photo reference of a similar space, to capture mostly the "lighting colour" and the "mood".
I had also used other photo references as guide to create the physical properties of most objects in the scene (i.e. chairs, wall, glass, floors,etc.).
It is worth noting that, I have personally found it quicker and easier to work with nice professional photo references as guide, as opposed to "making up things as I went along..."...which is much harder for both the client and the Visualiser.
In fact, I have recently contributed to an article about this subject, for 3D World magazine: