Recently I started to use the Z again and I must say it still trumps the K-1. The images just look and feel more quiet and spacious to me.
Sounds like a lot of bull and not very scientific but that is how I see it. And I could see it suddenly very well after only using the K-1 for month's.
Pixelshift is insane sharp and clear and equals the Z files in sharpness.
I haven't been using pixelshift so much lately because I don't want to lug around a tripod all the time for optimal performance.
It is about time to do some serious PS images again.
I really like the K-1. It is rather small for a dslr and very well build. Just love it. Really nice to stroll around the streets as I like to do.
The Sony A7r body felt more like a toy, although a very capable one.