Em5+Nokton 17.5 pro list:
Body is smaller
Smaler RAW files
Faster camera (scrolling through pics, zooming etc.)
10(ish) pics per sec
Better allrounder (mostly goes for the camera body)
A7r+FE 28mm pro list:
Great dynamic range
Sharper? (By a really thin hair.)
Lighter (around 340g, the A7 strap is on the Em5 in the picture above:p)/smaller (shorter lens)
More “pop” (Even though f0.95 = f1.9 on fullframe)
Faster shutter speed
And the winner is…? Dont know really. That depends on alot of things. the 12-32, 7.5mm and the 40-150 probably weighs the same togeather as 1 zoom lens does for the A7r.
For allround use, the mft system is great, there are light and small lenses. Small bodies with IBIS. Sure the never A7´s got that too but then they will be alot bigger and heavier.
The MFT system´s got the Noktons, so you can get short DOF and great sharpness. And then we have the Fullframe sensor 🙂 It has alot of cons, but also a few important pros, too some people.
Am i one of those people? i Think so… Not totally shure though.
Time will tell…