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 S9900w and Panasonic GX1 side-by-side from the front, back and top in their relative dimensions. Fujifilm S9900w has external dimensions of 123 x 87 x 116 mm (4.84 x 3.43 x 4.57″) and weighs 670 g (1.48 lb / 23.63 oz) (including batteries). Panasonic GX1 has external dimensions of 116 x 68 x 39 mm (4.57 x 2.68 x 1.54″) and weighs 318 g (0.70 lb / 11.22 oz) (including batteries).
Below you can see the front-view size comparison of the Fujifilm S9900w and the Panasonic GX1. Panasonic GX1 is clearly the smaller of the two cameras. Its body is 7mm narrower, 19mm shorter and 77mm thinner than Fujifilm S9900w. As you can tell, actually this is not a fair size comparison since Fujifilm S9900w has a built-in lens but Panasonic GX1 doesn't. Once you put a lens on GX1, its thickness will increase significantly.
Here is the back view size comparison of the Fujifilm S9900w and Panasonic GX1.
Now lets look at the top view comparison of Fujifilm S9900w and Panasonic GX1.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic GX1 is significantly lighter (352g ) than the Fujifilm S9900w 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 GX1, the total kit will weigh much higher.
Unfortunately neither the Fujifilm S9900w nor Panasonic Lumix DMC-GX1 provides any type of weather sealing in their bodies, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Bridge Cameras with Weather Sealing Top Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Fujifilm S9900w and Panasonic GX1's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.