IME, all NiZ/Plum EC boards (aka "Nopre) come pre-banded/silenced, whether they are under the brand of NiZ, Plum, Abko, Archon, or whoever else. All the same factory and they would (presumably) not vary their production process to eliminate what is a standard on every other board they make.
However, Of the 4+ Nopre boards I've owned, none have ever come pre-lubed. In fact, I always end up domeswapping to heavier weight for increased tactility/feel, and lubing is a necessary step I take while its all opened up, and vastly improves the slight scratchiness I experience with the stock switches.