If you look closely you can see a bit of haloing where the GH2 is applying more sharpening. But I like the way it does it, you only notice it on a resolution chart.I have found that my GH2 is better in most everything than my gh1 hacked with "C" settings, and that includes highly detailed scenes. Yes, it shocked me but I setup my cameras side by side and compared images. The GH1's image is softer and still had slightly more blocking/mud than the gh2.
The single thing I like about the gh1 more than the GH2 is the motion blur.
Thjat's comparing it with the Blackout-lpowell patch, of course.
On my cam, strangely enough, ISO 800 is slightly less noisy than the GH2. Maybe I have a good sensor. But the thing is, I would not bet money that I could tell them apart in a double blind test.