Sorry for the late post. I find Soundsphere's SN10 to be a good monitoring speaker but is definitely not an NS 10 clone. The thing I immediately noticed is a flattened mid high which is smoother compare to the harsh sound of the NS10. I also noticed a boosted mid low, thus the entire sound is a little bit smoother, balanced and bassier. For its price, as offered by NS10 Reborn, it is a good alternative speaker system, I would definitely use it as a main monitoring system, noting that, being used to NS10s, I can further boost the mid highs to approximate the sound of the NS10. The resulting sound will be a more in your face mix, the result of more pronounced mid highs.
As in any monitoring speaker, it is important for one to get used to its sound. I can easily get used to the SN10's characteristics.
FWIW