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 ZR3 and Fujifilm X10 side-by-side from the front, back and top in their relative dimensions. Panasonic ZR3 has external dimensions of 98 x 55 x 26 mm (3.86 x 2.17 x 1.02″) and weighs 159 g (0.35 lb / 5.61 oz) (including batteries). Fujifilm X10 has external dimensions of 117 x 70 x 57 mm (4.61 x 2.76 x 2.24″) and weighs 350 g (0.77 lb / 12.35 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic ZR3 and the Fujifilm X10. Panasonic ZR3 is clearly the smaller of the two cameras. Its body is 19mm narrower, 15mm shorter and 31mm thinner than Fujifilm X10.
Here is the back view size comparison of the Panasonic ZR3 and Fujifilm X10.
Now lets look at the top view comparison of Panasonic ZR3 and Fujifilm X10.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic ZR3 is significantly lighter (191g ) than the Fujifilm X10 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-ZR3 (Lumix DMC-ZX3) nor Fujifilm X10 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
Fujifilm X10's 2.80" LCD screen is slightly larger than Panasonic ZR3's 2.7 screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.