What makes this PEN Lite (E-PL3) different from PEN MINI is the camera features anti shock shutter, the availability of vibration/effect art filter, and a tilting 3.0-inch LCD screen.
The anti shock shutter sacrifices the shutter speed, with a small relay but it ensures more your shoot accuracy. And the vibration / effect art filter and the tilting LCD screen will give you wide space to release your creation on the images.
Meanwhile, other specs are same, such: a 12 MP 4/3 High Speed Live MOS sensor, TruePic VI engine, a compact M. Zuiko Digital 14-42mm lens, face detection and so on. However, the camera is only available in four colors: white, silver, black and red (more little choice compared to PEN MINI).