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 Samsung CL80 and Panasonic GH4 side-by-side from the front, back and top in their relative dimensions. Samsung CL80 has external dimensions of 104 x 58 x 20 mm (4.09 x 2.28 x 0.79″) and weighs 160 g (0.35 lb / 5.64 oz) (including batteries). Panasonic GH4 has external dimensions of 133 x 93 x 84 mm (5.24 x 3.66 x 3.31″) and weighs 560 g (1.23 lb / 19.75 oz) (including batteries).
Below you can see the front-view size comparison of the Samsung CL80 and the Panasonic GH4. Samsung CL80 is clearly the smaller of the two cameras. Its body is 29mm narrower, 35mm shorter and 64mm thinner than Panasonic GH4. As you can tell, actually this is not a fair size comparison since Samsung CL80 has a built-in lens but Panasonic GH4 doesn't. Once you put a lens on GH4, its thickness will increase significantly.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Samsung CL80 is significantly lighter (400g ) than the Panasonic GH4 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 GH4, the total kit will weigh much higher.
Weather Sealing
Thanks to the weather-sealed body of the GH4, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the CL80.
LCD Screen Size and Features
Samsung CL80's 3.70" LCD screen is slightly larger than Panasonic GH4's 3" screen.