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 Pentax XG-1 and Pentax VS20 side-by-side from the front, back and top in their relative dimensions. Pentax XG-1 has external dimensions of 119 x 89 x 98 mm (4.69 x 3.5 x 3.84″) and weighs 567 g (1.25 lb / 20.00 oz) (including batteries). Pentax VS20 has external dimensions of 111 x 61 x 38 mm (4.37 x 2.4 x 1.5″) and weighs 235 g (0.52 lb / 8.29 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax XG-1 and the Pentax VS20. Pentax VS20 is clearly the smaller of the two cameras. Its body is 8mm narrower, 28mm shorter and 60mm thinner than Pentax XG-1.
Here is the back view size comparison of the Pentax XG-1 and Pentax VS20.
Now lets look at the top view comparison of Pentax XG-1 and Pentax VS20.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax VS20 is significantly lighter (332g ) than the Pentax XG-1 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Pentax XG-1 nor Pentax Optio VS20 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 Bridge Cameras with Weather Sealing Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Pentax XG-1 and Pentax VS20'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.