For all intents and purposes, E-M10 is only slightly larger than E-PM2. I value compactness over ergonomics but not always willing to compromise on features. Oly E-M10 is a no-compromise compact camera: - pro level controls - bright and large EVF - high resolution large and bright 3:2 tilting touchscreen - impressive wi-fi implementation and iOS app - built-in flash - fully metal body - high end look and feel - very effective IBIS for both stills and video - full featured time-lapse mode - auto HDR mode which stitches images in-camera I briefly tried E-P5 and sold it shortly after. E-P5 looked good in pictures, but in hands it's kinda clumsy, boxy camera which is thick and heavy especially for the form factor. E-M10 feels significantly smaller in hands and is much closer to E-PM2. Love the silver/black color. Looks great with both black and silver lenses and accessories. Silver Oly 45 is precise color match (so is FL-300R). IBIS is absolutely amazing with both Oly 45 and PL25. I am able to shoot at 1/5s. The IBIS noise is quieter than E-P5 (which bothered me a lot). Love the wifi feature which seems to work faster than E-P5 for both file transfer and live view. This may be due to newer, faster processor in E-M10. Shutter is a bit quieter than E-PM2. Negatives: - frustrated by the apparent lack of LCD auto-brightness adjust. EVF has it but not LCD? Is it 2014? - Unfortunately, the tilting screen is a clumsy, thick one, like on E-PL5 and not the thinner, simpler type from E-P5 (or Sony Nex) LOVE the ability to share batteries and charger with my E-PM2. Perfect dual body combo, if you ask me. Can't wait to shoot with it this weekend. We'll report more!! P.S. I never liked E-M5 design but I absolutely love E-M10. Maybe the hump size makes all the difference?