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 Nikon L31 and Nikon S630 side-by-side from the front, back and top in their relative dimensions. Nikon L31 has external dimensions of 96 x 59 x 29 mm (3.78 x 2.32 x 1.14″) and weighs 160 g (0.35 lb / 5.64 oz) (including batteries). Nikon S630 has external dimensions of 58 x 97 x 26 mm (2.28 x 3.82 x 1.02″) and weighs 140 g (0.31 lb / 4.94 oz) (including batteries).
Below you can see the front view size comparison of Nikon L31 and Nikon S630. Nikon S630 is 38mm narrower and 3mm thinner than Nikon L31 but it is also 38mm taller.
Here is the back view size comparison of Nikon L31 and Nikon S630.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon S630 is 20g lighter than the Nikon L31 but we don't think this will make a significant difference.
Unfortunately neither Nikon Coolpix L31 nor Nikon Coolpix S630 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 Compact Cameras with Weather Sealing
LCD Screen Size and Features
Nikon L31 and Nikon S630's LCD screens has the same diagonal size of 2.7".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.