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-ZR100 and Sony W510 side-by-side from the front, back and top in their relative dimensions. Casio EX-ZR100 has external dimensions of 105 x 59 x 29 mm (4.13 x 2.32 x 1.14″) and weighs 204 g (0.45 lb / 7.20 oz) (including batteries). Sony W510 has external dimensions of 96 x 54 x 20 mm (3.78 x 2.13 x 0.79″) and weighs 119 g (0.26 lb / 4.20 oz) (including batteries).
Below you can see the front-view size comparison of the Casio EX-ZR100 and the Sony W510. Sony W510 is clearly the smaller of the two cameras. Its body is 9mm narrower, 5mm shorter and 9mm thinner than Casio EX-ZR100.
Here is the back view size comparison of the Casio EX-ZR100 and Sony W510.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony W510 is significantly lighter (85g ) than the Casio EX-ZR100 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Casio Exilim EX-ZR100 nor Sony Cyber-shot DSC-W510 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-ZR100's 3.00" LCD screen is slightly larger than Sony W510's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.