I'm less impressed with the JPEG processing on the Samsung NX210 than I was with the NX200's; it's not that it's worse, it's just that even as low as ISO 100 you can get better results from raw. By ISO 400 I see artifacts everywhere -- though not bad artifacts, and frankly I don't think they'll jump out at many people until you hit ISO 800. In contrast, raw-format night photos shot at ISO 3200 looked reasonably good printed at 13x19.
Interestingly, Samsung's Picture Wizard setting -- its color controls -- defaults to off, which is its most neutral setting, and my preferred option. However, if you're looking for a setting that automatically produces a higher-contrast, more saturated look comparable to what you get from other consumer cameras, you'll want to use the Standard setting. It produces decent results, boosting contrast and saturation slightly without sacrificing detail or accuracy.