Actually remote harvesting works a bit different than the corresponding feature nxt has. I guess both developers had their reasons to implement it the way they did.
Remove "unique" part anyway. The difference from Peercoin and Nxt is so small that people will still accuse NEM in a lie.
If the difference between
Peercoin and
Nxt is so small they accuse a different coin call
NEM of a lie

Strange logic.