Hi Dod ,
I have both,and use both,sliightly unusual,but it's just worked out that way.
The D2H is a fantastic camera and an absolute steal at present prices which is why I am keeping mine for present .
It's main plus points are pro build,great ergonomics,fast frames per sec,smaller files,weatherproofing,loads of features,takes great pictures if set up right,feels great in the hand,takes any nikon lens.great battery life.
It's minus points,struggles with lower light and high iso compared to 1D ,gets noisy above 800,white balance needs careful understanding,needs to shoot raw,pics need to be shot right size ,minimal cropping.works best with proper glass.
ID mk 2,
plus points,
Built like a tank,takes great pictures even at 1600 iso,real pro workhorse,weatherproofed,and once you get used to it a great camera taking great pictures.Fast shooting and buffering.Good colours ,except reds can be a problem needing careful control of white balance. More keepers than D2H.
minus points,
I think it is very complicated and controls can be very hard to use needing lots of fingers.
Very heavy !Screen is small and hard to see if pictures are sharp.
Bigger files but less noise.
The D2H for the money is a bargain in the hands of very competant photographer,it is easy to use if you are a Nikon man ,and offers a pro camera for the price of bridge camera.
In good to average light the results are fantastic with good glass,and the 4mp is not an issue.The smaller files can be very handy and much quicker to send as jpegs on the pc and to mags.
The Mk2 is a great camera ,no question but not perfect ,takes great pics,but again is no point and shoot for best results.
I might think of more in a bit,
Pons