wow that second one would easily have been one of the better tags on the wall maybe only behind Linda's.
Dunno about the sizing but defs isn't small in my books.

Anyway onto the CnC
One of the main floors in this is the colour blending. You see you have a nice background with nice effects and colours. Now the render's colours don't really complement this background. Next time try to maybe add some better adjustment layers to better tie it in.

Apart from that not much is wrong with this