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 Fujifilm S1 and Panasonic GX8 side-by-side from the front, back and top in their relative dimensions. Fujifilm S1 has external dimensions of 133 x 91 x 110 mm (5.24 x 3.58 x 4.33″) and weighs 680 g (1.50 lb / 23.99 oz) (including batteries). Panasonic GX8 has external dimensions of 133 x 78 x 63 mm (5.24 x 3.07 x 2.48″) and weighs 487 g (1.07 lb / 17.18 oz) (including batteries).
Below you can see the front-view size comparison of the Fujifilm S1 and the Panasonic GX8. As you can tell, actually this is not a fair size comparison since Fujifilm S1 has a built-in lens but Panasonic GX8 doesn't. Once you put a lens on GX8, its thickness will increase significantly.
Here is the back view size comparison of the Fujifilm S1 and Panasonic GX8.
Now lets look at the top view comparison of Fujifilm S1 and Panasonic GX8.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic GX8 is significantly lighter (193g ) than the Fujifilm S1 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 GX8, the total kit will weigh much higher.
Weather Sealing
Both the S1 and the GX8 have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Fujifilm S1 and Panasonic GX8's LCD screens have the same diagonal size of 3.00 inches.
Both cameras feature
Fully Articulating screens where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. Fully articulating screens are also useful for taking Selfies and video.