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 Canon M10 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). Canon M10 has external dimensions of 108 x 67 x 35 mm (4.25 x 2.64 x 1.38″) and weighs 301 g (0.66 lb / 10.62 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic ZR3 and the Canon M10. Panasonic ZR3 is clearly the smaller of the two cameras. Its body is 10mm narrower, 12mm shorter and 9mm thinner than Canon M10. As you can tell, actually this is not a fair size comparison since Panasonic ZR3 has a built-in lens but Canon M10 doesn't. Once you put a lens on M10, its thickness will increase significantly.
Here is the back view size comparison of the Panasonic ZR3 and Canon M10.
Now lets look at the top view comparison of Panasonic ZR3 and Canon M10.
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 (142g ) than the Canon M10 which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on M10, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-ZR3 (Lumix DMC-ZX3) nor Canon EOS M10 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 Top Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Canon M10's 3.00" LCD screen is slightly larger than Panasonic ZR3's 2.7 screen.
In addition to the size advantage, Canon M10 LCD screen also has a
Tilting feature where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. On the other hand, Panasonic ZR3 has a fixed type screen which provides less flexibility in shooting positions compared to M10.