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 Panasonic LX10 and Fujifilm X-T200 side-by-side from the front, back and top in their relative dimensions. Panasonic LX10 has external dimensions of 106 x 60 x 42 mm (4.17 x 2.36 x 1.65″) and weighs 310 g (0.68 lb / 10.93 oz) (including batteries). Fujifilm X-T200 has external dimensions of 121 x 84 x 55 mm (4.76 x 3.31 x 2.17″) and weighs 370 g (0.82 lb / 13.05 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic LX10 and the Fujifilm X-T200. Panasonic LX10 is clearly the smaller of the two cameras. Its body is 15mm narrower, 24mm shorter and 13mm thinner than Fujifilm X-T200. As you can tell, actually this is not a fair size comparison since Panasonic LX10 has a built-in lens but Fujifilm X-T200 doesn't. Once you put a lens on X-T200, its thickness will increase significantly.
Now lets look at the top view comparison of Panasonic LX10 and Fujifilm X-T200.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic LX10 is significantly lighter (60g ) than the Fujifilm X-T200 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 X-T200, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-LX10 (Lumix DMC-LX15) nor Fujifilm X-T200 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 Compact Cameras with Weather Sealing Top Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Fujifilm X-T200's 3.50" LCD screen is slightly larger than Panasonic LX10's 3 screen.