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 Canon SD980 IS 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). Canon SD980 IS has external dimensions of 100 x 53 x 23 mm (3.94 x 2.09 x 0.91″) and weighs 150 g (0.33 lb / 5.29 oz) (including batteries).
Below you can see the front-view size comparison of the Casio EX-Z450 and the Canon SD980 IS. Casio EX-Z450 is 19mm narrower and 2mm thinner than Canon SD980 IS but it is also 3mm taller.
Here is the back view size comparison of the Casio EX-Z450 and Canon SD980 IS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Casio EX-Z450 is significantly lighter (22g ) than the Canon SD980 IS which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Casio Exilim EX-Z450 nor Canon PowerShot SD980 IS / Digital IXUS 200 IS 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 and Canon SD980 IS'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.