Dunno. Neither Panny nor Samsung have a great reputation for JPG processing. So it is likely the RAW images that you will want to compare.
drsaurabhg, DPReview has a nice tool where you can compare the RAW output of different cameras. The Panasonic GF3 is listed, but the Samsung NX11 is not. However, the Samsung NX10 has been tested and I think the sensor and processing are quite similar to the NX11, so I think you'll get useful info from comparing the GF3 and the NX10.
The tool can be found here: http://www.dpreview.com/reviews/pana...gf3/page14.asp
From what I see there, the Panasonic GF3's RAW looks better than the Samsung's