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 ZS100 and Sony WX300 side-by-side from the front, back and top in their relative dimensions. Panasonic ZS100 has external dimensions of 111 x 65 x 44 mm (4.37 x 2.56 x 1.73″) and weighs 312 g (0.69 lb / 11.01 oz) (including batteries). Sony WX300 has external dimensions of 96 x 55 x 25 mm (3.78 x 2.16 x 0.98″) and weighs 166 g (0.37 lb / 5.86 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic ZS100 and the Sony WX300. Sony WX300 is clearly the smaller of the two cameras. Its body is 15mm narrower, 10mm shorter and 19mm thinner than Panasonic ZS100.
Now lets look at the top view comparison of Panasonic ZS100 and Sony WX300.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony WX300 is significantly lighter (146g ) than the Panasonic ZS100 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-ZS100 (Lumix DMC-TZ100) nor Sony Cyber-shot DSC-WX300 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 ZS100 and Sony WX300'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.