I just yesterday made the experience again that what is the greatest for one photographer is maybe only average for another while testing the GX7. This camera is praised so high and it is nice, but actually handling it and looking through the EVF turned me off. The camera feels cheap compared to the EM1 and the EVF does not even come close. Let alone ergonomics for my taste of the EM1 are MUCH better. And even size wise I do not feel the GX/ is much smaller while handling it or carrying it, especially when used with identical lenses. Actually the GX7 with kit zoom is too big for me to see an advantage size wise.
But again this is just me and others feel different. Same is with GH3, which per se would be a great camera even for me, if there was not the EM1.
Hope this helps to understand why I answered.