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 G1 X III and Sony A9 II side-by-side from the front, back and top in their relative dimensions. Canon G1 X III has external dimensions of 115 x 78 x 51 mm (4.53 x 3.07 x 2.01″) and weighs 399 g (0.88 lb / 14.07 oz) (including batteries). Sony A9 II has external dimensions of 129 x 96 x 76 mm (5.08 x 3.78 x 2.99″) and weighs 678 g (1.49 lb / 23.92 oz) (including batteries).
Below you can see the front-view size comparison of the Canon G1 X III and the Sony A9 II. Canon G1 X III is clearly the smaller of the two cameras. Its body is 14mm narrower, 18mm shorter and 25mm thinner than Sony A9 II. As you can tell, actually this is not a fair size comparison since Canon G1 X III has a built-in lens but Sony A9 II doesn't. Once you put a lens on A9 Mark II, its thickness will increase significantly.
Here is the back view size comparison of the Canon G1 X III and Sony A9 II.
Now lets look at the top view comparison of Canon G1 X III and Sony A9 II.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon G1 X III is significantly lighter (279g ) than the Sony A9 II 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 A9 Mark II, the total kit will weigh much higher.
Weather Sealing
Both the G1 X III and the A9 Mark II have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Canon G1 X III and Sony A9 II's LCD screens have the same diagonal size of 3.00 inches.
Sony A9 II features a
Tilting-only screen which is mostly only good for shooting from waist or over-the-head levels. On the other hand, Canon G1 X III sports a
Fully Articulated screen which is more flexible and useful, especially for taking selfies and video.