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-Z2000 and Sony W550 side-by-side from the front, back and top in their relative dimensions. Casio EX-Z2000 has external dimensions of 99 x 58 x 17 mm (3.9 x 2.28 x 0.67″) and weighs 152 g (0.34 lb / 5.36 oz) (including batteries). Sony W550 has external dimensions of 94 x 56 x 19 mm (3.7 x 2.2 x 0.75″) and weighs 110 g (0.24 lb / 3.88 oz) (including batteries).
Below you can see the front-view size comparison of the Casio EX-Z2000 and the Sony W550. Sony W550 is 5mm narrower and 2mm shorter than Casio EX-Z2000 but it is also 2mm thicker.
Here is the back view size comparison of the Casio EX-Z2000 and Sony W550.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony W550 is significantly lighter (42g ) than the Casio EX-Z2000 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Casio Exilim EX-Z2000 nor Sony Cyber-shot DSC-W550 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-Z2000 and Sony W550'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.