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 Panasonic FH10 and Canon S100 side-by-side from the front, back and top in their relative dimensions. Panasonic FH10 has external dimensions of 94 x 54 x 18 mm (3.7 x 2.13 x 0.71″) and weighs 103 g (0.23 lb / 3.63 oz) (including batteries). Canon S100 has external dimensions of 99 x 60 x 28 mm (3.9 x 2.36 x 1.1″) and weighs 198 g (0.44 lb / 6.98 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic FH10 and the Canon S100. Panasonic FH10 is clearly the smaller of the two cameras. Its body is 5mm narrower, 6mm shorter and 10mm thinner than Canon S100.
Now lets look at the top view comparison of Panasonic FH10 and Canon S100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic FH10 is significantly lighter (95g ) than the Canon S100 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-FH10 nor Canon PowerShot S100 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
Canon S100's 3.00" LCD screen is slightly larger than Panasonic FH10's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.