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 Samsung TL225 and Panasonic FX78 side-by-side from the front, back and top in their relative dimensions. Samsung TL225 has external dimensions of 100 x 60 x 19 mm (3.94 x 2.36 x 0.75″) and weighs 187 g (0.41 lb / 6.60 oz) (including batteries). Panasonic FX78 has external dimensions of 100 x 55 x 21 mm (3.94 x 2.17 x 0.83″) and weighs 142 g (0.31 lb / 5.01 oz) (including batteries).
Below you can see the front view size comparison of Samsung TL225 and Panasonic FX78.
Here is the back view size comparison of Samsung TL225 and Panasonic FX78.
Now lets look at the top view comparison of Samsung TL225 and Panasonic FX78.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Panasonic FX78 is significantly lighter (45g ) than the Samsung TL225 which may become a big advantage especially on long walking trips.
Unfortunately neither Samsung TL225 (ST550) nor Panasonic Lumix DMC-FX78 (Lumix DMC-FX77) 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
Samsung TL225 and Panasonic FX78's LCD screens has the same diagonal size of 3.5".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.