Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Nikon D4 and Samsung HZ15W side-by-side from the front, back and top in their relative dimensions. Nikon D4 has external dimensions of 160 x 157 x 91 mm (6.3 x 6.18 x 3.58″) and weighs 1340 g (2.95 lb / 47.27 oz) (including batteries). Samsung HZ15W has external dimensions of 105 x 61 x 37 mm (4.13 x 2.4 x 1.46″) and weighs 249 g (0.55 lb / 8.78 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon D4 and the Samsung HZ15W. Samsung HZ15W is clearly the smaller of the two cameras. Its body is 55mm narrower, 96mm shorter and 54mm thinner than Nikon D4. As you can tell, actually this is not a fair size comparison since Samsung HZ15W has a built-in lens but Nikon D4 doesn't. Once you put a lens on D4, its thickness will increase significantly.
Here is the back view size comparison of the Nikon D4 and Samsung HZ15W.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Samsung HZ15W is significantly lighter (1091g ) than the Nikon D4 which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on D4, the total kit will weigh much higher.
Weather Sealing
With its weather-sealed body, we believe that the D4 has a big advantage over the HZ15W which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Nikon D4's 3.20" LCD screen is slightly larger than Samsung HZ15W's 3" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.