Youâre randerr succs!
So far so good about that gentle part, pardon my humor. 
So, now about the first picture, it seems very⊠flat in matter of lighting, I mea, even the places under the furniture have no shadow. Where are your light sources and how strong did you make them? And especially, how many do you have?
The models look stunning, except a few things, which confuse me a bit.
First, the arm rests of the sofa, it is all soft and comfy and then you give it hard wooden arm rests. Seems to me, that this is destroying the idea of a soft sofa a bit.
Second the legs of the table. It feels a bit weird, that they are outside of the real table size, if you know what I mean. It looks a bit pumped, maybe try it out to push them a bit back under the table and get them in one line with the edges?
Idk, guess that is a matter of taste actually.
Oh, and the pillow on the yellow chair looks like it could fall over any second, to me. Also the handles on the cups seem a bit big, but that could be just me as well.
But back to the lighting.
To me it seems like you are using like at least one big light source to light up the whole scene, in addition to the lamps you that are to be seen in the second render. Anyway, I am just missing shadows a lot in your renders.
And speaking of Andrew Price, I highly recommend his video on photorealistic lighting:
The second render is suffering with about the same problems, also you could try and use some field of depth effect, since the camera of blender is recording, as if it could have every single thing in focus, which in the real world is not possible.
But at all this is a truly good render so far, I could not have done the models and the texturing at the level you did there, so probs for that! 
Keep going, I would love to see some further developed versions of this render! 