I know a lot of things have already been said on this topic, but I wanted to present some of my experiences which did surprise me, even after quite some research, and which I hope may be of help to others in my position. I used a GX7 which I still find a great camera, but had the itch of the long exposure capabilities of the Olympus bodies, so got me an EM5II... Although I think that for my needs it's the better camera, I would not dismiss the Panasonic right away. Leaving aside the very known differences which I am not going to list, what I found out, and was quite surprised, is that the extensive customization available to Oly users ends just a bit too soon. Contrary to Panasonic, the SCP is not customizable, and there's no way of putting silent shooting on any fn button(that said the normal shutter of the Oly is almost silent if compared to the GX7). Also, if fast startup time is very important to your style of shooting, the GX7 is a better choice. I am still not sure if it's a glitch or something, but with a Panasonic FL360L in red eye mode, there's a lag of about a second before it flashes (did not happen on the GX7). Last thing - in M there's no "shutter preview" mode available (Panasonic users will know if they need it or not). The only "mechanical" adaptation needed is with the dials - they're much easier to turn than on the Panasonic, especially the front one. Here muscle memory can play tricks! On the flip side, the menu is understandable, the hovering info useful, and really not problematic. The mobile app is better, it gives the option to be used as remote control or as a remote shutter (useful for long exposures). Oh, and I really like how it's easy to rename file sequences! One thing that is usually not highlighted, are the blinking over and underexposed areas in live preview - incredibly helpful! Lastly - the raw files are some 25% smaller, so people that like shooting with small sd cards will have that more space available per card.