Today, I have done some searches and found the following:-
1. NX10 Vs K-7 Vs EP-1: JPEG/ISO Test
http://www.optyczne.pl/122.6-Test_aparatu-Samsung_NX10_Jako%C5%9B%C4%87_obrazu_JPEG.html (in Polish)
Well, it seems that the pictures produced from any Samsung sensor camera suffer from either noise or loss of details, especially when ISO goes up. :-(
2. NX10 Vs GF-1 Vs EP-2: Full Detailed Shootout! (User Friendliness, EVF and LCD Qualities, IQ, AF Speed, Colour Accuracy, Exposure Accuracy and Flash Test, etc.!)
http://unwire.hk/2010/03/22/gf1-vs-ep2-vs-nx10/ (in Traditional Chinese)
3. NX10 Vs GF-1: JPEG/ISO Test
http://blog.paran.com/payton/35887908 (in Korean)
Explore Yourself!