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 Canon 400D and FujiFilm S200EXR side-by-side from the front, back and top in their relative dimensions. Canon 400D has external dimensions of 127 x 94 x 65 mm (5 x 3.7 x 2.56″) and weighs 556 g (1.23 lb / 19.61 oz) (including batteries). FujiFilm S200EXR has external dimensions of 133 x 94 x 145 mm (5.24 x 3.7 x 5.71″) and weighs 865 g (1.91 lb / 30.51 oz) (including batteries).
Below you can see the front view size comparison of Canon 400D and FujiFilm S200EXR. Canon 400D is 6mm narrower and 80mm thinner than Canon 400D but they have the same height of 94mm. As you can tell, actually this is not a fair size comparison since FujiFilm S200EXR has a built-in lens but Canon 400D doesn't. Once you put a lens on 400D, its thickness will increase significantly.
Comparison image of Canon 400D and FujiFilm S200EXR Size, Weight and External Dimensions - Front View
Now lets look at the top view comparison of Canon 400D and FujiFilm S200EXR.
Top View Comparison image of Canon 400D and FujiFilm S200EXR Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon 400D is significantly lighter (309g ) than the FujiFilm S200EXR 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 400D, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither Canon EOS 400D (EOS Digital Rebel XTi / EOS Kiss Digital X) nor FujiFilm FinePix S200EXR (FinePix S205EXR) 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 DSLR Cameras with Weather Sealing Top Bridge Cameras with Weather Sealing
LCD Screen Size and Features
FujiFilm S200EXR's 2.7" LCD screen is slightly larger than Canon 400D's 2.5" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.