One would hope/expect the Sony to generally outperform the GX8 (although there is no touchscreen on the Sony). The GX8 is $1199 and the Sony is $3198.Thank you for the detailed comparison... For me the interesting thing is: one is a µ43 and the other FullFormat. Sizewise comparable but not in performance...
For me µ43 shows its advantages in the GM5... (But the GX8 is interesting, too...)
Anyway back to the original thread, I am somewhat surprised that the GH4 hasn't been mentioned yet as someone's best camera. so cast my vote for the gh4. This camera is a rugged workhorse. mirrorless cameras have a well deserved reputation of having short battery life. Not the GH4. Yes you can buy more batteries, but then it becomes more difficult to manage ... And may force you to buy another charger to ensure all those batteries are full.
The ergonomics match how I work...the most common functions I use are ISO, white balance, MF/AF selection, AF/AE lock, and AF point selection. The first two are conveniently located by the shutter button, and the AF point can be selected by the touchscreen. I really think the gh4 is underrated in the stills department. part of it is its well deserved reputation as a pro video platform.