DxOmark (Click here) tested the GM1 Image Quality and the small surprise is that the GM1 delivers not the exact same performance of the GX7. DxO writes:
While it’s slightly disappointing that the sensor in the GM1 can’t match that of the GX7, the former is a few bucks south of $1000 body only. Nevertheless it has competitive image quality in a genuinely small package and the usefulness of the high-speed shutter shouldn’t be overlooked. Paired with the new zoom or the 20mm f1.7 pancake, the GM1 should prove popular as a walkabout.
Imaging Resource (Click here) posted the first part of their ongoing GM1 review. There is a very interesting part concerning the innovative shutter that occupies 80% less volume than that of the GX7! They also compared the IQ with these of other cameras and for now the reviewer quite likes the camera:
The GM1 feels strong, light and sturdy, and the compact 12-32mm makes it a go-anywhere camera. The autofocus system on the GM1 was brought over from the GX7, and it’s quite impressive.
These four point difference with the GX7 really shouldn’t worry anyone. With the GM1 you get a unique camera that you can truly carry with you anywhere.