@Kaizoku, I have not had any of the Garaydia blades in my hand since they first came out. My memory is not so good as to know for sure what I held in my hand 4 or so years ago. So, I cannot really answer the question and have a legitimate answer. I have seen Butterfly with a series of blades where the core of one is different. But it is not the norm.
And if you have someone who has the blade in his hand and he is asserting that the core of his two Garaydia blades both have the same wood for the core, and it is Kiri, then it is sort of hard to argue. And the person would have to have a bad eye for seeing and feeling different woods. Balsa and Kiri would not look exactly alike. They should also play slightly different. But it should not make too big a deal.
As for the accuracy of Butterfly's statements about their products....for well over a decade Butterfly listed that the core of a Viscaria was Balsa. At one point it may have been. But it definitely is not any longer. And for a very long time that was listed while the core of the Viscaria was definitely not Balsa. TableTennisDB which is now RevSpin also had it listed that Viscaria had a Balsa core. I see they no longer have that listed either. So there are times when the ply construction of a blade, listed on the internet is not correct.
And it is entirely possible that, when I listed the construction for the Garaydia ZLC, I took it from a site that listed the core as Balsa. Since that post is long enough ago.
So, I don't know for sure what the core of a Garaydia ZLC is. And I would have to have one in my hand to say definitively. But since Gwneved says he has one in his hand, we may as well assume he would be able to tell the difference between Kiri and Balsa. I am not sure those differences are worth the bother of the debate if you don't also have the blade in your hand, or, really, even if you did.
The difference in play between a Primorac Cabon and a Schlager Carbon is not sooooo big. They are more similar than they are different even though, it looks like one had a Kiri core and one had a Balsa core. Without those in my hand I still could not tell you that for sure though. So, why go down this road.