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 S9300 and Pentax Q-S1 side-by-side from the front, back and top in their relative dimensions. Nikon S9300 has external dimensions of 109 x 62 x 31 mm (4.29 x 2.44 x 1.22″) and weighs 215 g (0.47 lb / 7.58 oz) (including batteries). Pentax Q-S1 has external dimensions of 105 x 58 x 34 mm (4.13 x 2.28 x 1.34″) and weighs 203 g (0.45 lb / 7.16 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S9300 and the Pentax Q-S1. Pentax Q-S1 is 4mm narrower and 4mm shorter than Nikon S9300 but it is also 3mm thicker. As you can tell, actually this is not a fair size comparison since Nikon S9300 has a built-in lens but Pentax Q-S1 doesn't. Once you put a lens on Q-S1, its thickness will increase significantly.
Here is the back view size comparison of the Nikon S9300 and Pentax Q-S1.
Now lets look at the top view comparison of Nikon S9300 and Pentax Q-S1.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax Q-S1 is 12g lighter than the Nikon S9300 but we don't think this will make a significant difference.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on Q-S1, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Nikon Coolpix S9300 nor Pentax Q-S1 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 Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Nikon S9300 and Pentax Q-S1'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.