compare sensors on Nikon D4 vs D800E

THANX TO THE THREE OF YOU WHO DID TAKE THE TIME TO RESPOND

My dilemma is that I am looking for the sharpness & richness in colour to be above average in the pics that I take.

I want to be able to print a few keepers & want these pictures to hang on my walls.

As RB said in his response, I am used to the body of my D2Xs but have held (not tried) a D800 with extra battery pack & it does not feel that bad (not as balanced as a D2Xs).

The response from inasir 1971 suggests that downsampling from a 36 mp camera is so much better than a pic from a 16 mp camera.

Can one really see the difference in these 2 pics?