Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Samsung NX100 and Nikon L830 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). Nikon L830 has external dimensions of 110 x 76 x 91 mm (4.33 x 2.99 x 3.58″) and weighs 508 g (1.12 lb / 17.92 oz) (including batteries).
Below you can see the front view size comparison of Samsung NX100 and Nikon L830. Samsung NX100 is 5mm shorter and 56mm thinner than Nikon L830 but it is also 10mm wider. As you can tell, actually this is not a fair size comparison since Nikon L830 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 Nikon L830.
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 (226g ) than the Nikon L830 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.
Unfortunately neither Samsung NX100 nor Nikon Coolpix L830 provides any type of weather sealing in their body, 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 Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Samsung NX100 and Nikon L830's LCD screens has the same diagonal size of 3".
On the other hand, Nikon L830 features a Tilting screen
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels whereas the Samsung NX100 has a fixed type screen which provides less flexibility in shooting positions compared to L830.