I was in the same boat ..... anyway Steve Huff says most of what I felt .....
" ...The E-M1 is built better, feels better and I prefer the control layout.
The E-M1 has a sturdier pro level shutter, will last longer.
The E-M1 is freeze proof and shock proof, better weather sealing than the EM5 Mark II.
The E-M1 is slightly larger, fitting into my hand perfectly without adding a grip.
The E-M1, for me, provides slightly better IQ with sharper and richer files. Not sure why, but this is the case. It’s slight but there.
.......
For me, I just enjoyed using the E-M1 a bit more, but I have a feeling a new E-M1 Mark II will be out within a year and I will bet you that it will not only have the new features of the 5 Mark II, but newer features exclusive to the new model. Just a guess but Olympus will HAVE To do this as the new E-M5 II will start eating into the E-M1 sales because of what it offers for less money. For most, the E-M5 Mark II, at $300 less cost than the E-M1 while offering more, will be the favorite choice. Truth be told, if buying from scratch I would choose the E-M5 II over the E-M1. Having the E-M1, I would not sell to go to the 5II. For me, owning both is the answer.
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
The 5II makes a perfect complement to the E-M1 as a 2nd body as you get the best of both worlds."
http://www.stevehuffphoto.com/2015/02/18/the-olympus-om-d-e-m5-mark-ii-review-olympus-continues-to-innovate/