I have a Panasonic G3 first (in between also owned GF2 and GF5) and very recently E-PM2. I would think that Panasonic is more user-friendly than Olympus, but after getting used to, I'm fine with both. Although Olympus interface is not so good, it allows many small adjustments to settings (which is great!) But between both brands, they each have their pros and cons. Right now, the Olympus has the advantage of the better sensor and the IBIS, allows in-camera RAW editing and better out-of-camera jpegs (subjective also.) Hence, I would pick an Olympus with the better sensor than a Panasonic. Panasonic produces many superior lenses though! As for Olympus, I picked E-PM2 for the following reasons: 1. It uses the same sensor as OMD E-M5. 2. It is the lightest and smallest amongst those with newer, better sensor (i.e. E-M5 & E-PL5.) 3. It does not use an AA filter. 4. It is officially and fully compatible with Toshiba FlashAir SD card (with dedicated smartphone app.) Note that the E-M5 and E-PL5 are not. 5. It is cheaper than E-PL5 and E-M5. 6. I personally find it more pleasing in terms of handling and ergonomics. I don't like the shape and handling of E-M5, buttons/dials/knobs seem cramped up, with a protruding top, and overall it also looks super ugly! As for the E-PL5, I always accidentally pressed the movie record button, especially when using the tilt-screen for self-portrait. The only think I hate about the E-PM2 now is the hotshoe flash I need to attach on the body. I would much prefer Panasonic built-in flash. Also a bit lacking is the tilt screen found with E-PL5. It is good to have but not absolutely necessary. It only jacks up cost and makes it bigger and heavier over the E-PM2.