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 Nikon S9100 and Olympus SP-100 side-by-side from the front, back and top in their relative dimensions. Nikon S9100 has external dimensions of 105 x 62 x 35 mm (4.13 x 2.44 x 1.38″) and weighs 214 g (0.47 lb / 7.55 oz) (including batteries). Olympus SP-100 has external dimensions of 122 x 91 x 133 mm (4.8 x 3.6 x 5.25″) and weighs 594 g (1.31 lb / 20.95 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S9100 and the Olympus SP-100. Nikon S9100 is clearly the smaller of the two cameras. Its body is 17mm narrower, 29mm shorter and 98mm thinner than Olympus SP-100.
Here is the back view size comparison of the Nikon S9100 and Olympus SP-100.
Now lets look at the top view comparison of Nikon S9100 and Olympus SP-100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon S9100 is significantly lighter (380g ) than the Olympus SP-100 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Nikon Coolpix S9100 nor Olympus Stylus SP-100 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 Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Nikon S9100 and Olympus SP-100's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.