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 ZS3 and Fujifilm Z300 side-by-side from the front, back and top in their relative dimensions. Panasonic ZS3 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 229 g (0.50 lb / 8.08 oz) (including batteries). Fujifilm Z300 has external dimensions of 92 x 57 x 19 mm (3.62 x 2.24 x 0.75″) and weighs 155 g (0.34 lb / 5.47 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic ZS3 and the Fujifilm Z300. Fujifilm Z300 is clearly the smaller of the two cameras. Its body is 11mm narrower, 3mm shorter and 14mm thinner than Panasonic ZS3.
Now lets look at the top view comparison of Panasonic ZS3 and Fujifilm Z300.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Fujifilm Z300 is significantly lighter (74g ) than the Panasonic ZS3 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-ZS3 (Lumix DMC-TZ7) nor Fujifilm FinePix Z300 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
Panasonic ZS3 and Fujifilm Z300'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.