In summary, the OM-D E-M1 has advanced on the OM-D E-M5 in a number of key areas. It feels the more refined camera of the two as it should with a price tag that makes it one of the most expensive CSCs we've seen from the manufacturer. The clear advantages the E-M1 offers over the E-M5 are its compatibility with Olympus E-system lenses, Dual Fast AF system, high-resolution screen, improved electronic viewfinder, 5-axis image stabilisation and Wi-fi integration. This does come at a price, but for those who's budget the E-M1 exceeds, the E-M5 remains a great stills camera that's capable of delivering excellent image quality from its 16MP sensor.
The design of the OM-D E-M5 (above) is thinner than that of the E-M1 (below).
The E-M1's pronounced handgrip offers more to wrap the hand around to get a strong, firm grasp.