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 Pentax Q10 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). Pentax Q10 has external dimensions of 102 x 58 x 34 mm (4.02 x 2.28 x 1.34″) and weighs 200 g (0.44 lb / 7.05 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S6100 and the Pentax Q10. Nikon S6100 is 4mm narrower and 7mm thinner than Nikon S6100 but they have the same height of 58mm. As you can tell, actually this is not a fair size comparison since Nikon S6100 has a built-in lens but Pentax Q10 doesn't. Once you put a lens on Q10, its thickness will increase significantly.
Here is the back view size comparison of the Nikon S6100 and Pentax Q10.
Now lets look at the top view comparison of Nikon S6100 and Pentax Q10.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon S6100 is 25g lighter than the Pentax Q10 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 Q10, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Nikon Coolpix S6100 nor Pentax Q10 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 S6100 and Pentax Q10'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.