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 Canon SX620 HS and Panasonic G6 side-by-side from the front, back and top in their relative dimensions. Canon SX620 HS has external dimensions of 97 x 57 x 28 mm (3.81 x 2.24 x 1.1″) and weighs 182 g (0.40 lb / 6.42 oz) (including batteries). Panasonic G6 has external dimensions of 122 x 85 x 71 mm (4.8 x 3.35 x 2.8″) and weighs 390 g (0.86 lb / 13.76 oz) (including batteries).
Below you can see the front-view size comparison of the Canon SX620 HS and the Panasonic G6. Canon SX620 HS is clearly the smaller of the two cameras. Its body is 25mm narrower, 28mm shorter and 43mm thinner than Panasonic G6. As you can tell, actually this is not a fair size comparison since Canon SX620 HS has a built-in lens but Panasonic G6 doesn't. Once you put a lens on G6, its thickness will increase significantly.
Now lets look at the top view comparison of Canon SX620 HS and Panasonic G6.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon SX620 HS is significantly lighter (208g ) than the Panasonic G6 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 G6, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Canon PowerShot SX620 HS nor Panasonic Lumix DMC-G6 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 SX620 HS and Panasonic G6's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Panasonic G6 sports a
Fully Articulated screen which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over-the-head levels, and especially very useful for shooting selfies and video. Canon SX620 HS's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to G6.