Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Olympus E-M10 IV and Panasonic GH2 side-by-side from the front, back and top in their relative dimensions. Olympus E-M10 IV has external dimensions of 122 x 84 x 49 mm (4.8 x 3.31 x 1.93″) and weighs 383 g (0.84 lb / 13.51 oz) (including batteries). Panasonic GH2 has external dimensions of 124 x 90 x 76 mm (4.88 x 3.54 x 2.99″) and weighs 442 g (0.97 lb / 15.59 oz) (including batteries).
Below you can see the front view size comparison of Olympus E-M10 IV and Panasonic GH2. Olympus E-M10 IV is clearly the smaller of the two cameras. Its body is 2mm narrower, 6mm shorter and 27mm thinner than Panasonic GH2.
Now lets look at the top view comparison of Olympus E-M10 IV and Panasonic GH2.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus E-M10 IV is 59g lighter than the Panasonic GH2 but we don't think this will make a significant difference.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since both Olympus E-M10 IV and Panasonic GH2 have the same Micro Four Thirds lens mount and Four Thirds sized sensors, lenses will not be a differentiator on total size of the system.
Unfortunately neither Olympus OM-D E-M10 IV nor Panasonic Lumix DMC-GH2 provides any type of weather sealing in their body, 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 Mirrorless Cameras with Weather Sealing
LCD Screen Size and Features
Olympus E-M10 IV and Panasonic GH2's LCD screens has the same diagonal size of 3".
Olympus E-M10 IV features a Tilting only screen
which is mostly only good for shooting from waist or over the head levels. On the other hand, Panasonic GH2 sports a Fully Articulated screen
which is more flexible and useful especially for taking Selfie shots and video.