Jonathan Wong reviewed both cameras, the Samsung NX10 and the Olympus E-PL1. You can read his review on SteveHuffPhoto.com.
In short what he didn’t like about the Samsung NX:
– the AF gets confused easily in low light
– the Auto-ISO programming is AWFUL (Some daft genius at Samsung, however, has decided in their infinite wisdom that a minimum shutter speed of 1/15 is ok!!!)
– the EVF is pretty horrid (pixels galore!)
– the Samsung has a tendency to blow colors out with all the elegance of a rhino in ballet shoes.
And here the conclusion:
“For all intents and purposes, this review could end here: the Olympus E-PL1
That hurts!