OK, so here's my POV,
So the Wrath, has been trained since... when? he was 10? 15? Seeing as how he's what, 20? when he reaches the academy on Korriban, and he's been called ''the best of his class'' or something. then, a month later or so, he killes his overseer. An overseer, not a lord, not a darth, an overseer. and bear in mind that that's after 5-10 years + the extra month or so on korriban.
Nox, on the other hand, has had no previous training, or guidance, and yet (I'm just gonna assume that Acolytes spend a month on Korriban) after his extremely short training, he kills a Lord (Skotia's gaurd), a Darth (Skotia), another Lord (The one on Nar Shadaa). after minimal training.
Wrath beats an overseer. which is cool, but not as cool as killing a darth after no training at all.
Sooo... Nox
And that's just the beginning, but I gtg, so finish it later