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 G15 and Panasonic G7 side-by-side from the front, back and top in their relative dimensions. Canon G15 has external dimensions of 107 x 76 x 40 mm (4.21 x 2.99 x 1.57″) and weighs 352 g (0.78 lb / 12.42 oz) (including batteries). Panasonic G7 has external dimensions of 125 x 86 x 77 mm (4.92 x 3.39 x 3.03″) and weighs 410 g (0.90 lb / 14.46 oz) (including batteries).
Below you can see the front-view size comparison of the Canon G15 and the Panasonic G7. Canon G15 is clearly the smaller of the two cameras. Its body is 18mm narrower, 10mm shorter and 37mm thinner than Panasonic G7. As you can tell, actually this is not a fair size comparison since Canon G15 has a built-in lens but Panasonic G7 doesn't. Once you put a lens on G7, its thickness will increase significantly.
Here is the back view size comparison of the Canon G15 and Panasonic G7.
Now lets look at the top view comparison of Canon G15 and Panasonic G7.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon G15 is significantly lighter (58g ) than the Panasonic G7 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 G7, the total kit will weigh much higher.
Weather Sealing
Unfortunately neither the Canon PowerShot G15 nor Panasonic Lumix DMC-G7 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 G15 and Panasonic G7's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Panasonic G7 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 G15's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to G7.