From what I understand, nothing SPS comes out of Vietnam. They are supposedly very strict about SPS. What I DO know is that when exporting Coral fom wherever, there is no such thing as LE. It's all "Acropora SP". Meaning that it doesn't get all the crazy names (and pricetags) till it gets here..
That said, they have the internet in far off places like Indo, Fiji etc and see what the stuff is going for here, and subsequently charge more for super nice pieces.
I know when I was exporting, there wasn't LE anything. Just nice pieces, which I sent to my better customers.