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 Sony W610 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). Sony W610 has external dimensions of 93 x 52 x 19 mm (3.66 x 2.05 x 0.75″) and weighs 113 g (0.25 lb / 3.99 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S9100 and the Sony W610. Sony W610 is clearly the smaller of the two cameras. Its body is 12mm narrower, 10mm shorter and 16mm thinner than Nikon S9100.
Here is the back view size comparison of the Nikon S9100 and Sony W610.
Now lets look at the top view comparison of Nikon S9100 and Sony W610.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony W610 is significantly lighter (101g ) than the Nikon S9100 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Nikon Coolpix S9100 nor Sony Cyber-shot DSC-W610 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
LCD Screen Size and Features
Nikon S9100's 3.00" LCD screen is slightly larger than Sony W610's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.