Olympus keeps the curve manipulation tool it debuted in the E-M5. The E-M1 has a locked mode dial, and it adds a mode for the Photo Story feature, like the E-P5.
Unlike the E-M5's optional grip, the E-M1's vertical grip doesn't attach to the side of the camera. But the E-M1 doesn't need that, because it has a real grip itself. It does have the same convention of using two programmable function buttons rather than duplicating the same functions as found in the horizonal orientation.
