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 Ricoh G900 and Leica M10 side-by-side from the front, back and top in their relative dimensions. Ricoh G900 has external dimensions of 118 x 66 x 33 mm (4.65 x 2.6 x 1.3″) and weighs 247 g (0.54 lb / 8.71 oz) (including batteries). Leica M10 has external dimensions of 139 x 39 x 80 mm (5.47 x 1.54 x 3.15″) and weighs 660 g (1.46 lb / 23.28 oz) (including batteries).
Below you can see the front-view size comparison of the Ricoh G900 and the Leica M10. Ricoh G900 is 21mm narrower and 47mm thinner than Leica M10 but it is also 27mm taller. As you can tell, actually this is not a fair size comparison since Ricoh G900 has a built-in lens but Leica M10 doesn't. Once you put a lens on M10, its thickness will increase significantly.
Here is the back view size comparison of the Ricoh G900 and Leica M10.
Now lets look at the top view comparison of Ricoh G900 and Leica M10.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Ricoh G900 is significantly lighter (413g ) than the Leica 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
Thanks to the weather-sealed body of the G900, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the M10.
LCD Screen Size and Features
Ricoh G900 and Leica M10's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.