Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Casio EX-Z450 and Samsung ST150F 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). Samsung ST150F has external dimensions of 94 x 58 x 18 mm (3.7 x 2.28 x 0.71″) and weighs 114 g (0.25 lb / 4.02 oz) (including batteries).
Below you can see the front view size comparison of Casio EX-Z450 and Samsung ST150F. Casio EX-Z450 is 13mm narrower and 2mm shorter than Samsung ST150F but it is also 3mm thicker.
Here is the back view size comparison of Casio EX-Z450 and Samsung ST150F.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Samsung ST150F is 14g lighter than the Casio EX-Z450 but we don't think this will make a significant difference.
Unfortunately neither Casio Exilim EX-Z450 nor Samsung ST150F provides any type of weather sealing in their body, 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 and Samsung ST150F's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.