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 NX100 and Leica X2 side-by-side from the front, back and top in their relative dimensions. Samsung NX100 has external dimensions of 120 x 71 x 35 mm (4.72 x 2.8 x 1.38″) and weighs 282 g (0.62 lb / 9.95 oz) (including batteries). Leica X2 has external dimensions of 124 x 69 x 52 mm (4.88 x 2.72 x 2.05″) and weighs 345 g (0.76 lb / 12.17 oz) (including batteries).
Below you can see the front-view size comparison of the Samsung NX100 and the Leica X2. Samsung NX100 is 4mm narrower and 17mm thinner than Leica X2 but it is also 2mm taller. As you can tell, actually this is not a fair size comparison since Leica X2 has a built-in lens but Samsung NX100 doesn't. Once you put a lens on NX100, its thickness will increase significantly.
Now lets look at the top view comparison of Samsung NX100 and Leica X2.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Samsung NX100 is significantly lighter (63g ) than the Leica X2 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 NX100, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Samsung NX100 nor Leica X2 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 Mirrorless Cameras with Weather Sealing Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Samsung NX100's 3.00" LCD screen is slightly larger than Leica X2's 2.7 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.