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 Olympus E-PM2 and Olympus FE-5010 side-by-side from the front, back and top in their relative dimensions. Olympus E-PM2 has external dimensions of 110 x 64 x 34 mm (4.33 x 2.52 x 1.34″) and weighs 269 g (0.59 lb / 9.49 oz) (including batteries). Olympus FE-5010 has external dimensions of 96 x 57 x 21 mm (3.78 x 2.24 x 0.83″) and weighs 130 g (0.29 lb / 4.59 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus E-PM2 and the Olympus FE-5010. Olympus FE-5010 is clearly the smaller of the two cameras. Its body is 14mm narrower, 7mm shorter and 13mm thinner than Olympus E-PM2. As you can tell, actually this is not a fair size comparison since Olympus FE-5010 has a built-in lens but Olympus E-PM2 doesn't. Once you put a lens on E-PM2, its thickness will increase significantly.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Olympus FE-5010 is significantly lighter (139g ) than the Olympus E-PM2 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 E-PM2, the total kit will weigh much higher.
Weather Sealing
Thanks to the weather-sealed body of the FE-5010, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the E-PM2.
LCD Screen Size and Features
Olympus E-PM2's 3.00" LCD screen is slightly larger than Olympus FE-5010's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.