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 S6100 and Canon ELPH 310 HS side-by-side from the front, back and top in their relative dimensions. Nikon S6100 has external dimensions of 98 x 58 x 27 mm (3.86 x 2.28 x 1.06″) and weighs 175 g (0.39 lb / 6.17 oz) (including batteries). Canon ELPH 310 HS has external dimensions of 96 x 57 x 22 mm (3.78 x 2.24 x 0.87″) and weighs 140 g (0.31 lb / 4.94 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S6100 and the Canon ELPH 310 HS. Canon ELPH 310 HS is clearly the smaller of the two cameras. Its body is 2mm narrower, 1mm shorter and 5mm thinner than Nikon S6100.
Here is the back view size comparison of the Nikon S6100 and Canon ELPH 310 HS.
Now lets look at the top view comparison of Nikon S6100 and Canon ELPH 310 HS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 310 HS is significantly lighter (35g ) than the Nikon S6100 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Nikon Coolpix S6100 nor Canon ELPH 310 HS (IXUS 230 HS) 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 S6100 and Canon ELPH 310 HS'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.