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 S9900 and Sony QX100 side-by-side from the front, back and top in their relative dimensions. Nikon S9900 has external dimensions of 112 x 66 x 40 mm (4.41 x 2.6 x 1.57″) and weighs 289 g (0.64 lb / 10.19 oz) (including batteries). Sony QX100 has external dimensions of 63 x 63 x 56 mm (2.46 x 2.46 x 2.19″) and weighs 179 g (0.39 lb / 6.31 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S9900 and the Sony QX100. Sony QX100 is 49mm narrower and 3mm shorter than Nikon S9900 but it is also 16mm thicker.
Now lets look at the top view comparison of Nikon S9900 and Sony QX100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony QX100 is significantly lighter (110g ) than the Nikon S9900 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Nikon Coolpix S9900 nor Sony Cyber-shot DSC-QX100 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 S9900's 3.00" LCD screen is slightly larger than Sony QX100's screen.
Moreover, Nikon S9900 sports a
Fully Articulated screen which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over-the-head levels, and especially very useful for shooting selfies and video. On the other hand, Sony QX100 has a fixed type screen which provides almost no flexibility in shooting positions compared to S9900.