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 X-E2 and Fujifilm X100S side-by-side from the front, back and top in their relative dimensions. Fujifilm X-E2 has external dimensions of 129 x 75 x 37 mm (5.08 x 2.95 x 1.46″) and weighs 350 g (0.77 lb / 12.35 oz) (including batteries). Fujifilm X100S has external dimensions of 127 x 74 x 54 mm (5 x 2.91 x 2.13″) and weighs 445 g (0.98 lb / 15.70 oz) (including batteries).
Below you can see the front-view size comparison of the Fujifilm X-E2 and the Fujifilm X100S. Fujifilm X100S is 2mm narrower and 1mm shorter than Fujifilm X-E2 but it is also 17mm thicker. As you can tell, actually this is not a fair size comparison since Fujifilm X100S has a built-in lens but Fujifilm X-E2 doesn't. Once you put a lens on X-E2, its thickness will increase significantly.
Here is the back view size comparison of the Fujifilm X-E2 and Fujifilm X100S.
Now lets look at the top view comparison of Fujifilm X-E2 and Fujifilm X100S.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Fujifilm X-E2 is significantly lighter (95g ) than the Fujifilm X100S 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-E2, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Fujifilm X-E2 nor Fujifilm X100S 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
Fujifilm X-E2's 3.00" LCD screen is slightly larger than Fujifilm X100S's 2.8 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.