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 Casio EX-Z450 and Panasonic S1 side-by-side from the front, back and top in their relative dimensions. Casio EX-Z450 has external dimensions of 81 x 56 x 21 mm (3.19 x 2.2 x 0.83″) and weighs 128 g (0.28 lb / 4.52 oz) (including batteries). Panasonic S1 has external dimensions of 99 x 59 x 21 mm (3.9 x 2.32 x 0.83″) and weighs 117 g (0.26 lb / 4.13 oz) (including batteries).
Below you can see the front-view size comparison of the Casio EX-Z450 and the Panasonic S1.
Here is the back view size comparison of the Casio EX-Z450 and Panasonic S1.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic S1 is 11g lighter than the Casio EX-Z450 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Casio Exilim EX-Z450 nor Panasonic Lumix DMC-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
LCD Screen Size and Features
Casio EX-Z450's 3.00" LCD screen is slightly larger than Panasonic S1's 2.7 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.