Six True Lives is a level far beyond Three Faux Lives.
Three Faux Lives, the opponent will eventually find a flaw.
Because what's fake is inevitably fake, with the passing of time, the faux body will turn into specks of light, scattering between Heaven and Earth. At this point, unless the opponent is a fool, he will certainly see something amiss.
Who turns into light when they die... unless they're in that weird place in the Phantom God Realm.
But the Six True Lives is completely different. It's a real, genuine flesh body!
It has flesh and blood, and everything else is exactly the same as the original body!
Even including memories... temperament... and all the knowledge it possesses!
Everything is identical to the original body!
Even the strongest cultivators, unless they already know that the individual has cultivated the divines abilities of the Nine Lives Technique, would find no anomalies.